213115868 has 24 divisors (see below), whose sum is σ = 436629984. Its totient is φ = 89107200.

The previous prime is 213115841. The next prime is 213115871. The reversal of 213115868 is 868511312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91673 + ... + 93968.

It is an arithmetic number, because the mean of its divisors is an integer number (18192916).

Almost surely, 2^213115868 is an apocalyptic number.

213115868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

213115868 is an abundant number, since it is smaller than the sum of its proper divisors (223514116).

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

213115868 is a wasteful number, since it uses less digits than its factorization.

213115868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185693 (or 185691 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 213115868 is about 14598.4885519015. The cubic root of 213115868 is about 597.3175325604.

The spelling of 213115868 in words is "two hundred thirteen million, one hundred fifteen thousand, eight hundred sixty-eight".