213831885 has 8 divisors (see below), whose sum is σ = 342131040. Its totient is φ = 114043664.

The previous prime is 213831883. The next prime is 213831889. The reversal of 213831885 is 588138312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213831885 - 2¹ = 213831883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213831881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7127715 + ... + 7127744.

It is an arithmetic number, because the mean of its divisors is an integer number (42766380).

Almost surely, 2^213831885 is an apocalyptic number.

It is an amenable number.

213831885 is a deficient number, since it is larger than the sum of its proper divisors (128299155).

213831885 is a wasteful number, since it uses less digits than its factorization.

213831885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14255467.

The product of its digits is 46080, while the sum is 39.

The square root of 213831885 is about 14622.9916569764. The cubic root of 213831885 is about 597.9857315492.

The spelling of 213831885 in words is "two hundred thirteen million, eight hundred thirty-one thousand, eight hundred eighty-five".