213395764 has 36 divisors (see below), whose sum is σ = 417364164. Its totient is φ = 95125248.

The previous prime is 213395671. The next prime is 213395789. The reversal of 213395764 is 467593312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 79067664 + 134328100 = 8892^2 + 11590^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20202 + ... + 28894.

It is an arithmetic number, because the mean of its divisors is an integer number (11593449).

Almost surely, 2^213395764 is an apocalyptic number.

It is an amenable number.

213395764 is a deficient number, since it is larger than the sum of its proper divisors (203968400).

213395764 is a wasteful number, since it uses less digits than its factorization.

213395764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752 (or 8731 counting only the distinct ones).

The product of its digits is 136080, while the sum is 40.

The square root of 213395764 is about 14608.0718782459. The cubic root of 213395764 is about 597.5789140824.

The spelling of 213395764 in words is "two hundred thirteen million, three hundred ninety-five thousand, seven hundred sixty-four".