215057061156 has 24 divisors (see below), whose sum is σ = 573485496640. Its totient is φ = 61444874592.

The previous prime is 215057061139. The next prime is 215057061157. The reversal of 215057061156 is 651160750512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (215057061157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280101471 + ... + 1280101638.

Almost surely, 2^215057061156 is an apocalyptic number.

It is an amenable number.

215057061156 is an abundant number, since it is smaller than the sum of its proper divisors (358428435484).

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

215057061156 is a wasteful number, since it uses less digits than its factorization.

215057061156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560203123 (or 2560203121 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 215057061156 in words is "two hundred fifteen billion, fifty-seven million, sixty-one thousand, one hundred fifty-six".