213566928 has 40 divisors (see below), whose sum is σ = 553202688. Its totient is φ = 70996992.

The previous prime is 213566911. The next prime is 213566929. The reversal of 213566928 is 829665312.

213566928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×213566928² = 91221665470714368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213566928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213566929) 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, 12576 + ... + 24192.

Almost surely, 2^213566928 is an apocalyptic number.

It is an amenable number.

213566928 is an abundant number, since it is smaller than the sum of its proper divisors (339635760).

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

213566928 is a wasteful number, since it uses less digits than its factorization.

213566928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12011 (or 12005 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 213566928 is about 14613.9292457573. The cubic root of 213566928 is about 597.7386433733.

The spelling of 213566928 in words is "two hundred thirteen million, five hundred sixty-six thousand, nine hundred twenty-eight".