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1420230031 = 111719399727
BaseRepresentation
bin101010010100110…
…1111110110001111
310122222102011100021
41110221233312033
510402034330111
6352532243011
750123520223
oct12451576617
93588364307
101420230031
11669756930
12337770467
131983127cc
14d689a783
1584a3dd71
hex54a6fd8f

1420230031 has 16 divisors (see below), whose sum is σ = 1726824960. Its totient is φ = 1151210880.

The previous prime is 1420229989. The next prime is 1420230061. The reversal of 1420230031 is 1300320241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1420230031 - 29 = 1420229519 is a prime.

It is a super-2 number, since 2×14202300312 = 4034106681908521922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1420229987 and 1420230014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420230061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196311 + ... + 203416.

It is an arithmetic number, because the mean of its divisors is an integer number (107926560).

Almost surely, 21420230031 is an apocalyptic number.

1420230031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1420230031 is a deficient number, since it is larger than the sum of its proper divisors (306594929).

1420230031 is a wasteful number, since it uses less digits than its factorization.

1420230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399774.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1420230031 is about 37685.9394336933. The cubic root of 1420230031 is about 1124.0515544693.

Adding to 1420230031 its reverse (1300320241), we get a palindrome (2720550272).

It can be divided in two parts, 1420 and 230031, that multiplied together give a triangular number (326644020 = T25559).

The spelling of 1420230031 in words is "one billion, four hundred twenty million, two hundred thirty thousand, thirty-one".

Divisors: 1 11 17 19 187 209 323 3553 399727 4396997 6795359 7594813 74748949 83542943 129111821 1420230031