213755564 has 12 divisors (see below), whose sum is σ = 408078888. Its totient is φ = 97161600.

The previous prime is 213755557. The next prime is 213755573. The reversal of 213755564 is 465557312.

It is a happy number.

It is a super-2 number, since 2×213755564² = 91382882281916192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2428997 + ... + 2429084.

It is an arithmetic number, because the mean of its divisors is an integer number (34006574).

Almost surely, 2^213755564 is an apocalyptic number.

It is an amenable number.

213755564 is a deficient number, since it is larger than the sum of its proper divisors (194323324).

213755564 is a wasteful number, since it uses less digits than its factorization.

213755564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4858096 (or 4858094 counting only the distinct ones).

The product of its digits is 126000, while the sum is 38.

The square root of 213755564 is about 14620.3818007602. The cubic root of 213755564 is about 597.9145786122.

The spelling of 213755564 in words is "two hundred thirteen million, seven hundred fifty-five thousand, five hundred sixty-four".