213124564 has 6 divisors (see below), whose sum is σ = 372967994. Its totient is φ = 106562280.

The previous prime is 213124553. The next prime is 213124573. The reversal of 213124564 is 465421312.

It can be written as a sum of positive squares in only one way, i.e., 184416400 + 28708164 = 13580^2 + 5358^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26640567 + ... + 26640574.

Almost surely, 2^213124564 is an apocalyptic number.

It is an amenable number.

213124564 is a deficient number, since it is larger than the sum of its proper divisors (159843430).

213124564 is a wasteful number, since it uses less digits than its factorization.

213124564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53281145 (or 53281143 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 213124564 is about 14598.7863879159. The cubic root of 213124564 is about 597.3256567836.

Adding to 213124564 its reverse (465421312), we get a palindrome (678545876).

The spelling of 213124564 in words is "two hundred thirteen million, one hundred twenty-four thousand, five hundred sixty-four".