215155125212 has 96 divisors (see below), whose sum is σ = 405688010112. Its totient is φ = 99489775616.

The previous prime is 215155125193. The next prime is 215155125239. The reversal of 215155125212 is 212521551512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609504428 + ... + 609504780.

It is an arithmetic number, because the mean of its divisors is an integer number (4225916772).

Almost surely, 2^215155125212 is an apocalyptic number.

It is an amenable number.

215155125212 is a deficient number, since it is larger than the sum of its proper divisors (190532884900).

215155125212 is a wasteful number, since it uses less digits than its factorization.

215155125212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 1005 counting only the distinct ones).

The product of its digits is 10000, while the sum is 32.

Adding to 215155125212 its reverse (212521551512), we get a palindrome (427676676724).

The spelling of 215155125212 in words is "two hundred fifteen billion, one hundred fifty-five million, one hundred twenty-five thousand, two hundred twelve".