211512664 has 16 divisors (see below), whose sum is σ = 432639720. Its totient is φ = 96142080.

The previous prime is 211512649. The next prime is 211512667. The reversal of 211512664 is 466215112.

It is a super-3 number, since 3×211512664³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211512667) 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, 1201689 + ... + 1201864.

Almost surely, 2^211512664 is an apocalyptic number.

It is an amenable number.

211512664 is an abundant number, since it is smaller than the sum of its proper divisors (221127056).

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

211512664 is a wasteful number, since it uses less digits than its factorization.

211512664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403570 (or 2403566 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 211512664 is about 14543.4749630204. The cubic root of 211512664 is about 595.8159499561.

Adding to 211512664 its reverse (466215112), we get a palindrome (677727776).

The spelling of 211512664 in words is "two hundred eleven million, five hundred twelve thousand, six hundred sixty-four".