213556564 has 24 divisors (see below), whose sum is σ = 419973120. Its totient is φ = 94278624.

The previous prime is 213556529. The next prime is 213556571. The reversal of 213556564 is 465655312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88084 + ... + 90475.

It is an arithmetic number, because the mean of its divisors is an integer number (17498880).

Almost surely, 2^213556564 is an apocalyptic number.

It is an amenable number.

213556564 is a deficient number, since it is larger than the sum of its proper divisors (206416556).

213556564 is a wasteful number, since it uses less digits than its factorization.

213556564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178599 (or 178597 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 213556564 is about 14613.5746482509. The cubic root of 213556564 is about 597.7289741741.

The spelling of 213556564 in words is "two hundred thirteen million, five hundred fifty-six thousand, five hundred sixty-four".