31421031232 has 56 divisors (see below), whose sum is σ = 62617746240. Its totient is φ = 15643499520.

The previous prime is 31421031221. The next prime is 31421031233. The reversal of 31421031232 is 23213012413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421031233) 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, 23785132 + ... + 23786452.

It is an arithmetic number, because the mean of its divisors is an integer number (1118174040).

Almost surely, 2^31421031232 is an apocalyptic number.

31421031232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31421031232 is a deficient number, since it is larger than the sum of its proper divisors (31196715008).

31421031232 is a wasteful number, since it uses less digits than its factorization.

31421031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31421031232 its reverse (23213012413), we get a palindrome (54634043645).

The spelling of 31421031232 in words is "thirty-one billion, four hundred twenty-one million, thirty-one thousand, two hundred thirty-two".