31505033212 has 6 divisors (see below), whose sum is σ = 55133808128. Its totient is φ = 15752516604.

The previous prime is 31505033207. The next prime is 31505033221. The reversal of 31505033212 is 21233050513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3938129148 + ... + 3938129155.

Almost surely, 2^31505033212 is an apocalyptic number.

It is an amenable number.

31505033212 is a deficient number, since it is larger than the sum of its proper divisors (23628774916).

31505033212 is a wasteful number, since it uses less digits than its factorization.

31505033212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876258307 (or 7876258305 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 31505033212 its reverse (21233050513), we get a palindrome (52738083725).

The spelling of 31505033212 in words is "thirty-one billion, five hundred five million, thirty-three thousand, two hundred twelve".