31230232031 has 4 divisors (see below), whose sum is σ = 31230645600. Its totient is φ = 31229818464.

The previous prime is 31230232013. The next prime is 31230232039. The reversal of 31230232031 is 13023203213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31230232031 - 2¹⁸ = 31229969887 is a prime.

It is a super-2 number, since 2×31230232031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31230231994 and 31230232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230232039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57671 + ... + 256488.

It is an arithmetic number, because the mean of its divisors is an integer number (7807661400).

Almost surely, 2^31230232031 is an apocalyptic number.

31230232031 is a deficient number, since it is larger than the sum of its proper divisors (413569).

31230232031 is an equidigital number, since it uses as much as digits as its factorization.

31230232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413568.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31230232031 its reverse (13023203213), we get a palindrome (44253435244).

The spelling of 31230232031 in words is "thirty-one billion, two hundred thirty million, two hundred thirty-two thousand, thirty-one".