212155164 has 54 divisors (see below), whose sum is σ = 580723416. Its totient is φ = 65276640.

The previous prime is 212155123. The next prime is 212155183. The reversal of 212155164 is 461551212.

212155164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212155164² = 90019627223733792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11352 + ... + 23519.

Almost surely, 2^212155164 is an apocalyptic number.

It is an amenable number.

212155164 is an abundant number, since it is smaller than the sum of its proper divisors (368568252).

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

212155164 is a wasteful number, since it uses less digits than its factorization.

212155164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34907 (or 34889 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 212155164 is about 14565.5471575908. The cubic root of 212155164 is about 596.4186322073.

The spelling of 212155164 in words is "two hundred twelve million, one hundred fifty-five thousand, one hundred sixty-four".