212865516 has 24 divisors (see below), whose sum is σ = 551873840. Its totient is φ = 70955136.

The previous prime is 212865503. The next prime is 212865553. The reversal of 212865516 is 615568212.

212865516 is a `hidden beast` number, since 21 + 2 + 86 + 551 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985381 + ... + 985596.

Almost surely, 2^212865516 is an apocalyptic number.

It is an amenable number.

212865516 is an abundant number, since it is smaller than the sum of its proper divisors (339008324).

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

212865516 is a wasteful number, since it uses less digits than its factorization.

212865516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970990 (or 1970982 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 212865516 is about 14589.9114459273. The cubic root of 212865516 is about 597.0835468035.

The spelling of 212865516 in words is "two hundred twelve million, eight hundred sixty-five thousand, five hundred sixteen".