31431111132 has 24 divisors (see below), whose sum is σ = 73686844672. Its totient is φ = 10427382000.

The previous prime is 31431111121. The next prime is 31431111143. The reversal of 31431111132 is 23111113413.

It is an interprime number because it is at equal distance from previous prime (31431111121) and next prime (31431111143).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31431111099 and 31431111108.

It is a congruent number.

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, 6204244 + ... + 6209307.

Almost surely, 2^31431111132 is an apocalyptic number.

It is an amenable number.

31431111132 is an abundant number, since it is smaller than the sum of its proper divisors (42255733540).

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

31431111132 is a wasteful number, since it uses less digits than its factorization.

31431111132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12413769 (or 12413767 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 31431111132 its reverse (23111113413), we get a palindrome (54542224545).

The spelling of 31431111132 in words is "thirty-one billion, four hundred thirty-one million, one hundred eleven thousand, one hundred thirty-two".