31145000232 has 32 divisors (see below), whose sum is σ = 79761588480. Its totient is φ = 10128455040.

The previous prime is 31145000179. The next prime is 31145000251. The reversal of 31145000232 is 23200054113.

It is a super-2 number, since 2×31145000232² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31145000199 and 31145000208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15824728 + ... + 15826695.

It is an arithmetic number, because the mean of its divisors is an integer number (2492549640).

Almost surely, 2^31145000232 is an apocalyptic number.

It is an amenable number.

31145000232 is an abundant number, since it is smaller than the sum of its proper divisors (48616588248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31145000232 is a wasteful number, since it uses less digits than its factorization.

31145000232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31651473 (or 31651469 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 31145000232 its reverse (23200054113), we get a palindrome (54345054345).

The spelling of 31145000232 in words is "thirty-one billion, one hundred forty-five million, two hundred thirty-two", and thus it is an aban number.