31313133132 has 24 divisors (see below), whose sum is σ = 74154486336. Its totient is φ = 10281924048.

The previous prime is 31313133083. The next prime is 31313133151. The reversal of 31313133132 is 23133131313.

It is a super-2 number, since 2×31313133132² (a number of 22 digits) contains 22 as substring.

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

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, 19472538 + ... + 19474145.

It is an arithmetic number, because the mean of its divisors is an integer number (3089770264).

Almost surely, 2^31313133132 is an apocalyptic number.

It is an amenable number.

31313133132 is an abundant number, since it is smaller than the sum of its proper divisors (42841353204).

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

31313133132 is a wasteful number, since it uses less digits than its factorization.

31313133132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38946757 (or 38946755 counting only the distinct ones).

The product of its digits is 1458, while the sum is 24.

Adding to 31313133132 its reverse (23133131313), we get a palindrome (54446264445).

The spelling of 31313133132 in words is "thirty-one billion, three hundred thirteen million, one hundred thirty-three thousand, one hundred thirty-two".