31201311232 has 160 divisors (see below), whose sum is σ = 77347049472. Its totient is φ = 12243861504.

The previous prime is 31201311217. The next prime is 31201311257. The reversal of 31201311232 is 23211310213.

It is a super-2 number, since 2×31201311232² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5914548 + ... + 5919820.

Almost surely, 2^31201311232 is an apocalyptic number.

31201311232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31201311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38673524736).

31201311232 is an abundant number, since it is smaller than the sum of its proper divisors (46145738240).

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

31201311232 is a wasteful number, since it uses less digits than its factorization.

31201311232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5438 (or 5422 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31201311232 its reverse (23211310213), we get a palindrome (54412621445).

The spelling of 31201311232 in words is "thirty-one billion, two hundred one million, three hundred eleven thousand, two hundred thirty-two".