31261233432 has 64 divisors (see below), whose sum is σ = 91816220160. Its totient is φ = 8744400000.

The previous prime is 31261233413. The next prime is 31261233439. The reversal of 31261233432 is 23433216213.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31261233432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31261233439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4550944 + ... + 4557807.

It is an arithmetic number, because the mean of its divisors is an integer number (1434628440).

Almost surely, 2^31261233432 is an apocalyptic number.

It is an amenable number.

31261233432 is an abundant number, since it is smaller than the sum of its proper divisors (60554986728).

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

31261233432 is a wasteful number, since it uses less digits than its factorization.

31261233432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9108784 (or 9108780 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

Adding to 31261233432 its reverse (23433216213), we get a palindrome (54694449645).

The spelling of 31261233432 in words is "thirty-one billion, two hundred sixty-one million, two hundred thirty-three thousand, four hundred thirty-two".