215715611212 has 12 divisors (see below), whose sum is σ = 377506449936. Its totient is φ = 107856625520.

The previous prime is 215715611207. The next prime is 215715611233. The reversal of 215715611212 is 212116517512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213762 + ... + 690742.

It is an arithmetic number, because the mean of its divisors is an integer number (31458870828).

Almost surely, 2^215715611212 is an apocalyptic number.

It is an amenable number.

215715611212 is a deficient number, since it is larger than the sum of its proper divisors (161790838724).

215715611212 is a wasteful number, since it uses less digits than its factorization.

215715611212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590048 (or 590046 counting only the distinct ones).

The product of its digits is 8400, while the sum is 34.

The spelling of 215715611212 in words is "two hundred fifteen billion, seven hundred fifteen million, six hundred eleven thousand, two hundred twelve".