213983664 has 40 divisors (see below), whose sum is σ = 555297792. Its totient is φ = 71004480.

The previous prime is 213983647. The next prime is 213983683. The reversal of 213983664 is 466389312.

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, 709 + ... + 20699.

Almost surely, 2^213983664 is an apocalyptic number.

213983664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213983664 is an abundant number, since it is smaller than the sum of its proper divisors (341314128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213983664 is a wasteful number, since it uses less digits than its factorization.

213983664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20225 (or 20219 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 213983664 is about 14628.1804746865. The cubic root of 213983664 is about 598.1271825625.

The spelling of 213983664 in words is "two hundred thirteen million, nine hundred eighty-three thousand, six hundred sixty-four".