31133000212 has 12 divisors (see below), whose sum is σ = 54522791316. Its totient is φ = 15555059840.

The previous prime is 31133000209. The next prime is 31133000219. The reversal of 31133000212 is 21200033113.

It can be written as a sum of positive squares in 2 ways, for example, as 18739967236 + 12393032976 = 136894^2 + 111324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31133000219) 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, 2853943 + ... + 2864830.

It is an arithmetic number, because the mean of its divisors is an integer number (4543565943).

Almost surely, 2^31133000212 is an apocalyptic number.

It is an amenable number.

31133000212 is a deficient number, since it is larger than the sum of its proper divisors (23389791104).

31133000212 is a wasteful number, since it uses less digits than its factorization.

31133000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720138 (or 5720136 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31133000212 its reverse (21200033113), we get a palindrome (52333033325).

The spelling of 31133000212 in words is "thirty-one billion, one hundred thirty-three million, two hundred twelve", and thus it is an aban number.