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1020331431 = 3375398579
BaseRepresentation
bin111100110100010…
…000010110100111
32122002221012121000
4330310100112213
54042201101211
6245125124343
734166450130
oct7464202647
92562835530
101020331431
11483a50119
122458596b3
13133508412
1499720c87
155e89a656
hex3cd105a7

1020331431 has 16 divisors (see below), whose sum is σ = 1727545600. Its totient is φ = 583046424.

The previous prime is 1020331421. The next prime is 1020331463. The reversal of 1020331431 is 1341330201.

1020331431 is a `hidden beast` number, since 1 + 0 + 203 + 31 + 431 = 666.

1020331431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1020331431 - 210 = 1020330407 is a prime.

It is a super-2 number, since 2×10203314312 = 2082152458173015522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020331421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2699101 + ... + 2699478.

It is an arithmetic number, because the mean of its divisors is an integer number (107971600).

Almost surely, 21020331431 is an apocalyptic number.

1020331431 is a deficient number, since it is larger than the sum of its proper divisors (707214169).

1020331431 is an equidigital number, since it uses as much as digits as its factorization.

1020331431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5398595 (or 5398589 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1020331431 is about 31942.6271774881. The cubic root of 1020331431 is about 1006.7317258485.

Adding to 1020331431 its reverse (1341330201), we get a palindrome (2361661632).

The spelling of 1020331431 in words is "one billion, twenty million, three hundred thirty-one thousand, four hundred thirty-one".

Divisors: 1 3 7 9 21 27 63 189 5398579 16195737 37790053 48587211 113370159 145761633 340110477 1020331431