213765736 has 8 divisors (see below), whose sum is σ = 400810770. Its totient is φ = 106882864.

The previous prime is 213765709. The next prime is 213765743. The reversal of 213765736 is 637567312.

It can be written as a sum of positive squares in only one way, i.e., 209380900 + 4384836 = 14470^2 + 2094^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360351 + ... + 13360366.

Almost surely, 2^213765736 is an apocalyptic number.

It is an amenable number.

213765736 is a deficient number, since it is larger than the sum of its proper divisors (187045034).

213765736 is a wasteful number, since it uses less digits than its factorization.

213765736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26720723 (or 26720719 counting only the distinct ones).

The product of its digits is 158760, while the sum is 40.

The square root of 213765736 is about 14620.7296671541. The cubic root of 213765736 is about 597.9240627952.

The spelling of 213765736 in words is "two hundred thirteen million, seven hundred sixty-five thousand, seven hundred thirty-six".