31233113231 has 8 divisors (see below), whose sum is σ = 31311878400. Its totient is φ = 31154444440.

The previous prime is 31233113221. The next prime is 31233113243. The reversal of 31233113231 is 13231133213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31233113231 - 2¹⁸ = 31232851087 is a prime.

It is a super-2 number, since 2×31233113231² (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 = 31233113197 and 31233113206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233113221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648266 + ... + 694776.

It is an arithmetic number, because the mean of its divisors is an integer number (3913984800).

Almost surely, 2^31233113231 is an apocalyptic number.

31233113231 is a deficient number, since it is larger than the sum of its proper divisors (78765169).

31233113231 is a wasteful number, since it uses less digits than its factorization.

31233113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48189.

The product of its digits is 972, while the sum is 23.

Adding to 31233113231 its reverse (13231133213), we get a palindrome (44464246444).

The spelling of 31233113231 in words is "thirty-one billion, two hundred thirty-three million, one hundred thirteen thousand, two hundred thirty-one".