212806458 has 12 divisors (see below), whose sum is σ = 461080698. Its totient is φ = 70935480.

The previous prime is 212806453. The next prime is 212806463. The reversal of 212806458 is 854608212.

212806458 is a `hidden beast` number, since 2 + 1 + 2 + 8 + 0 + 645 + 8 = 666.

212806458 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212806453) and next prime (212806463).

It can be written as a sum of positive squares in only one way, i.e., 133471809 + 79334649 = 11553^2 + 8907^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (212806453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5911273 + ... + 5911308.

Almost surely, 2^212806458 is an apocalyptic number.

212806458 is an abundant number, since it is smaller than the sum of its proper divisors (248274240).

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

212806458 is a wasteful number, since it uses less digits than its factorization.

212806458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11822589 (or 11822586 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 212806458 is about 14587.8873727487. The cubic root of 212806458 is about 597.0283228569.

The spelling of 212806458 in words is "two hundred twelve million, eight hundred six thousand, four hundred fifty-eight".