216254656 has 28 divisors (see below), whose sum is σ = 451718680. Its totient is φ = 102435840.

The previous prime is 216254641. The next prime is 216254657. The reversal of 216254656 is 656452612.

It is not an unprimeable number, because it can be changed into a prime (216254657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87705 + ... + 90136.

It is an arithmetic number, because the mean of its divisors is an integer number (16132810).

Almost surely, 2^216254656 is an apocalyptic number.

It is an amenable number.

216254656 is an abundant number, since it is smaller than the sum of its proper divisors (235464024).

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

216254656 is a wasteful number, since it uses less digits than its factorization.

216254656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177872 (or 177862 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 216254656 is about 14705.5994777500. The cubic root of 216254656 is about 600.2356999897.

The spelling of 216254656 in words is "two hundred sixteen million, two hundred fifty-four thousand, six hundred fifty-six".