211456664 has 16 divisors (see below), whose sum is σ = 413719920. Its totient is φ = 101131360.

The previous prime is 211456633. The next prime is 211456703. The reversal of 211456664 is 466654112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574427 + ... + 574794.

It is an arithmetic number, because the mean of its divisors is an integer number (25857495).

Almost surely, 2^211456664 is an apocalyptic number.

It is an amenable number.

211456664 is a deficient number, since it is larger than the sum of its proper divisors (202263256).

211456664 is a wasteful number, since it uses less digits than its factorization.

211456664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149250 (or 1149246 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 211456664 is about 14541.5495735496. The cubic root of 211456664 is about 595.7633626584.

The spelling of 211456664 in words is "two hundred eleven million, four hundred fifty-six thousand, six hundred sixty-four".