213163785 has 32 divisors (see below), whose sum is σ = 381972480. Its totient is φ = 112783104.

The previous prime is 213163763. The next prime is 213163801. The reversal of 213163785 is 587361312.

213163785 is a `hidden beast` number, since 2 + 13 + 1 + 637 + 8 + 5 = 666.

213163785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213163785 - 2⁹ = 213163273 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10929 + ... + 23361.

It is an arithmetic number, because the mean of its divisors is an integer number (11936640).

Almost surely, 2^213163785 is an apocalyptic number.

It is an amenable number.

213163785 is a deficient number, since it is larger than the sum of its proper divisors (168808695).

213163785 is a wasteful number, since it uses less digits than its factorization.

213163785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12574 (or 12568 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 213163785 is about 14600.1296227123. The cubic root of 213163785 is about 597.3622961901.

The spelling of 213163785 in words is "two hundred thirteen million, one hundred sixty-three thousand, seven hundred eighty-five".