256632216 has 32 divisors (see below), whose sum is σ = 647473200. Its totient is φ = 84758400.

The previous prime is 256632209. The next prime is 256632217. The reversal of 256632216 is 612236652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256632217) 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, 46435 + ... + 51666.

Almost surely, 2^256632216 is an apocalyptic number.

It is an amenable number.

256632216 is an abundant number, since it is smaller than the sum of its proper divisors (390840984).

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

256632216 is a wasteful number, since it uses less digits than its factorization.

256632216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98219 (or 98215 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 256632216 is about 16019.7445672520. The cubic root of 256632216 is about 635.4826891882.

Adding to 256632216 its reverse (612236652), we get a palindrome (868868868).

The spelling of 256632216 in words is "two hundred fifty-six million, six hundred thirty-two thousand, two hundred sixteen".