212208865 has 16 divisors (see below), whose sum is σ = 279930816. Its totient is φ = 153150400.

The previous prime is 212208859. The next prime is 212208877. The reversal of 212208865 is 568802212.

It is a de Polignac number, because none of the positive numbers 2^k-212208865 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212208865.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7522 + ... + 21931.

It is an arithmetic number, because the mean of its divisors is an integer number (17495676).

Almost surely, 2^212208865 is an apocalyptic number.

It is an amenable number.

212208865 is a deficient number, since it is larger than the sum of its proper divisors (67721951).

212208865 is a wasteful number, since it uses less digits than its factorization.

212208865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29600.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 212208865 is about 14567.3904663807. The cubic root of 212208865 is about 596.4689500570.

The spelling of 212208865 in words is "two hundred twelve million, two hundred eight thousand, eight hundred sixty-five".