212885685 has 16 divisors (see below), whose sum is σ = 378463680. Its totient is φ = 113538960.

The previous prime is 212885641. The next prime is 212885731. The reversal of 212885685 is 586588212.

212885685 is a `hidden beast` number, since 2 + 1 + 2 + 88 + 568 + 5 = 666.

It is not a de Polignac number, because 212885685 - 2⁸ = 212885429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212885685.

It is a congruent number.

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, 788331 + ... + 788600.

It is an arithmetic number, because the mean of its divisors is an integer number (23653980).

Almost surely, 2^212885685 is an apocalyptic number.

It is an amenable number.

212885685 is a deficient number, since it is larger than the sum of its proper divisors (165577995).

212885685 is a wasteful number, since it uses less digits than its factorization.

212885685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576945 (or 1576939 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 212885685 is about 14590.6026263482. The cubic root of 212885685 is about 597.1024040895.

The spelling of 212885685 in words is "two hundred twelve million, eight hundred eighty-five thousand, six hundred eighty-five".