212163210 has 48 divisors (see below), whose sum is σ = 630429696. Its totient is φ = 48494304.

The previous prime is 212163199. The next prime is 212163223. The reversal of 212163210 is 12361212.

212163210 is a `hidden beast` number, since 2 + 1 + 21 + 632 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 167754 + ... + 169013.

It is an arithmetic number, because the mean of its divisors is an integer number (13133952).

Almost surely, 2^212163210 is an apocalyptic number.

212163210 is an abundant number, since it is smaller than the sum of its proper divisors (418266486).

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

212163210 is a wasteful number, since it uses less digits than its factorization.

212163210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336787 (or 336784 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 212163210 is about 14565.8233546889. The cubic root of 212163210 is about 596.4261718519.

The spelling of 212163210 in words is "two hundred twelve million, one hundred sixty-three thousand, two hundred ten".