212165464 has 16 divisors (see below), whose sum is σ = 454640400. Its totient is φ = 90928032.

The previous prime is 212165441. The next prime is 212165497. The reversal of 212165464 is 464561212.

It is a happy number.

It is a super-2 number, since 2×212165464² = 90028368228670592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894279 + ... + 1894390.

It is an arithmetic number, because the mean of its divisors is an integer number (28415025).

Almost surely, 2^212165464 is an apocalyptic number.

It is an amenable number.

212165464 is an abundant number, since it is smaller than the sum of its proper divisors (242474936).

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

212165464 is a wasteful number, since it uses less digits than its factorization.

212165464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788682 (or 3788678 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 212165464 is about 14565.9007273838. The cubic root of 212165464 is about 596.4282839678.

The spelling of 212165464 in words is "two hundred twelve million, one hundred sixty-five thousand, four hundred sixty-four".