213992764 has 12 divisors (see below), whose sum is σ = 380835000. Its totient is φ = 105182768.

The previous prime is 213992761. The next prime is 213992777. The reversal of 213992764 is 467299312.

It is a self number, because there is not a number n which added to its sum of digits gives 213992764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213992761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453139 + ... + 453610.

It is an arithmetic number, because the mean of its divisors is an integer number (31736250).

Almost surely, 2^213992764 is an apocalyptic number.

It is an amenable number.

213992764 is a deficient number, since it is larger than the sum of its proper divisors (166842236).

213992764 is a wasteful number, since it uses less digits than its factorization.

213992764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906812 (or 906810 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 213992764 is about 14628.4915148487. The cubic root of 213992764 is about 598.1356612163.

The spelling of 213992764 in words is "two hundred thirteen million, nine hundred ninety-two thousand, seven hundred sixty-four".