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30310031 = 172104879
BaseRepresentation
bin111001110011…
…1111010001111
32010000220112202
41303213322033
530224410111
63001352115
7515426303
oct163477217
963026482
1030310031
1116122414
12a19863b
13638313b
14404dd03
1529dab3b
hex1ce7e8f

30310031 has 6 divisors (see below), whose sum is σ = 32198160. Its totient is φ = 28526816.

The previous prime is 30310019. The next prime is 30310037. The reversal of 30310031 is 13001303.

Adding to 30310031 its reverse (13001303), we get a palindrome (43311334).

It is not a de Polignac number, because 30310031 - 214 = 30293647 is a prime.

It is a super-2 number, since 2×303100312 = 1837395958441922, 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 = 30309994 and 30310021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30310037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52151 + ... + 52728.

It is an arithmetic number, because the mean of its divisors is an integer number (5366360).

Almost surely, 230310031 is an apocalyptic number.

30310031 is a deficient number, since it is larger than the sum of its proper divisors (1888129).

30310031 is a wasteful number, since it uses less digits than its factorization.

30310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104913 (or 104896 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 11.

The square root of 30310031 is about 5505.4546587907. The cubic root of 30310031 is about 311.7899604019.

The spelling of 30310031 in words is "thirty million, three hundred ten thousand, thirty-one".

Divisors: 1 17 289 104879 1782943 30310031