31133201320 has 32 divisors (see below), whose sum is σ = 75438142920. Its totient is φ = 11495335680.

The previous prime is 31133201299. The next prime is 31133201347. The reversal of 31133201320 is 2310233113.

It can be written as a sum of positive squares in 4 ways, for example, as 11190677796 + 19942523524 = 105786^2 + 141218^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29935251 + ... + 29936290.

Almost surely, 2^31133201320 is an apocalyptic number.

It is an amenable number.

31133201320 is an abundant number, since it is smaller than the sum of its proper divisors (44304941600).

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

31133201320 is a wasteful number, since it uses less digits than its factorization.

31133201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59871565 (or 59871561 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31133201320 its reverse (2310233113), we get a palindrome (33443434433).

The spelling of 31133201320 in words is "thirty-one billion, one hundred thirty-three million, two hundred one thousand, three hundred twenty".