213917256 has 96 divisors (see below), whose sum is σ = 701101440. Its totient is φ = 57521664.

The previous prime is 213917201. The next prime is 213917261. The reversal of 213917256 is 652719312.

213917256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 213917256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3916 + ... + 21051.

It is an arithmetic number, because the mean of its divisors is an integer number (7303140).

Almost surely, 2^213917256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213917256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350550720).

213917256 is an abundant number, since it is smaller than the sum of its proper divisors (487184184).

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

213917256 is a wasteful number, since it uses less digits than its factorization.

213917256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25003 (or 24996 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 213917256 is about 14625.9104332004. The cubic root of 213917256 is about 598.0653016088.

The spelling of 213917256 in words is "two hundred thirteen million, nine hundred seventeen thousand, two hundred fifty-six".