215006656 has 28 divisors (see below), whose sum is σ = 430654968. Its totient is φ = 106495232.

The previous prime is 215006653. The next prime is 215006657. The reversal of 215006656 is 656600512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215006653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8851 + ... + 22546.

Almost surely, 2^215006656 is an apocalyptic number.

It is an amenable number.

215006656 is an abundant number, since it is smaller than the sum of its proper divisors (215648312).

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

215006656 is a wasteful number, since it uses less digits than its factorization.

215006656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31516 (or 31506 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 215006656 is about 14663.1052645748. The cubic root of 215006656 is about 599.0788234839.

The spelling of 215006656 in words is "two hundred fifteen million, six thousand, six hundred fifty-six".