212075664 has 20 divisors (see below), whose sum is σ = 547862256. Its totient is φ = 70691872.

The previous prime is 212075639. The next prime is 212075687. The reversal of 212075664 is 466570212.

It is a super-2 number, since 2×212075664² = 89952174522081792, which contains 22 as substring.

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, 2209074 + ... + 2209169.

Almost surely, 2^212075664 is an apocalyptic number.

212075664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212075664 is an abundant number, since it is smaller than the sum of its proper divisors (335786592).

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

212075664 is a wasteful number, since it uses less digits than its factorization.

212075664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418254 (or 4418248 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 212075664 is about 14562.8178591919. The cubic root of 212075664 is about 596.3441250962.

The spelling of 212075664 in words is "two hundred twelve million, seventy-five thousand, six hundred sixty-four".