213516664 has 32 divisors (see below), whose sum is σ = 405926640. Its totient is φ = 105280000.

The previous prime is 213516637. The next prime is 213516673. The reversal of 213516664 is 466615312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226434 + ... + 227374.

Almost surely, 2^213516664 is an apocalyptic number.

It is an amenable number.

213516664 is a deficient number, since it is larger than the sum of its proper divisors (192409976).

213516664 is a wasteful number, since it uses less digits than its factorization.

213516664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311 (or 1307 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 213516664 is about 14612.2094154170. The cubic root of 213516664 is about 597.6917461425.

The spelling of 213516664 in words is "two hundred thirteen million, five hundred sixteen thousand, six hundred sixty-four".