212765715 has 12 divisors (see below), whose sum is σ = 368793984. Its totient is φ = 113475024.

The previous prime is 212765701. The next prime is 212765719. The reversal of 212765715 is 517567212.

212765715 is a `hidden beast` number, since 2 + 12 + 76 + 571 + 5 = 666.

It is not a de Polignac number, because 212765715 - 2⁴ = 212765699 is a prime.

It is a super-2 number, since 2×212765715² = 90538498958922450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212765715.

It is not an unprimeable number, because it can be changed into a prime (212765719) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2364019 + ... + 2364108.

It is an arithmetic number, because the mean of its divisors is an integer number (30732832).

Almost surely, 2^212765715 is an apocalyptic number.

212765715 is a deficient number, since it is larger than the sum of its proper divisors (156028269).

212765715 is a wasteful number, since it uses less digits than its factorization.

212765715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728138 (or 4728135 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 212765715 is about 14586.4908391292. The cubic root of 212765715 is about 596.9902189420.

The spelling of 212765715 in words is "two hundred twelve million, seven hundred sixty-five thousand, seven hundred fifteen".