216725256 has 48 divisors (see below), whose sum is σ = 640326960. Its totient is φ = 65674080.

The previous prime is 216725233. The next prime is 216725261. The reversal of 216725256 is 652527612.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 216725256.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136030 + ... + 137613.

It is an arithmetic number, because the mean of its divisors is an integer number (13340145).

Almost surely, 2^216725256 is an apocalyptic number.

It is an amenable number.

216725256 is an abundant number, since it is smaller than the sum of its proper divisors (423601704).

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

216725256 is a wasteful number, since it uses less digits than its factorization.

216725256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273666 (or 273659 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 216725256 is about 14721.5914900530. The cubic root of 216725256 is about 600.6707831372.

The spelling of 216725256 in words is "two hundred sixteen million, seven hundred twenty-five thousand, two hundred fifty-six".