213664712 has 8 divisors (see below), whose sum is σ = 400621350. Its totient is φ = 106832352.

The previous prime is 213664697. The next prime is 213664739. The reversal of 213664712 is 217466312.

It can be written as a sum of positive squares in only one way, i.e., 213335236 + 329476 = 14606^2 + 574^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13354037 + ... + 13354052.

Almost surely, 2^213664712 is an apocalyptic number.

It is an amenable number.

213664712 is a deficient number, since it is larger than the sum of its proper divisors (186956638).

213664712 is a wasteful number, since it uses less digits than its factorization.

213664712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26708095 (or 26708091 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 213664712 is about 14617.2744381434. The cubic root of 213664712 is about 597.8298565553.

The spelling of 213664712 in words is "two hundred thirteen million, six hundred sixty-four thousand, seven hundred twelve".