31311133332 has 12 divisors (see below), whose sum is σ = 73059311136. Its totient is φ = 10437044440.

The previous prime is 31311133331. The next prime is 31311133351. The reversal of 31311133332 is 23333111313.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311133331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304630544 + ... + 1304630567.

It is an arithmetic number, because the mean of its divisors is an integer number (6088275928).

Almost surely, 2^31311133332 is an apocalyptic number.

It is an amenable number.

31311133332 is an abundant number, since it is smaller than the sum of its proper divisors (41748177804).

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

31311133332 is a wasteful number, since it uses less digits than its factorization.

31311133332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609261118 (or 2609261116 counting only the distinct ones).

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

Adding to 31311133332 its reverse (23333111313), we get a palindrome (54644244645).

The spelling of 31311133332 in words is "thirty-one billion, three hundred eleven million, one hundred thirty-three thousand, three hundred thirty-two".