213884831 has 4 divisors (see below), whose sum is σ = 221260200. Its totient is φ = 206509464.

The previous prime is 213884819. The next prime is 213884833. The reversal of 213884831 is 138488312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213884831 - 2²² = 209690527 is a prime.

It is a super-2 number, since 2×213884831² = 91493441863797122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213884833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687641 + ... + 3687698.

It is an arithmetic number, because the mean of its divisors is an integer number (55315050).

Almost surely, 2^213884831 is an apocalyptic number.

213884831 is a deficient number, since it is larger than the sum of its proper divisors (7375369).

213884831 is an equidigital number, since it uses as much as digits as its factorization.

213884831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7375368.

The product of its digits is 36864, while the sum is 38.

The square root of 213884831 is about 14624.8019131884. The cubic root of 213884831 is about 598.0350823741.

The spelling of 213884831 in words is "two hundred thirteen million, eight hundred eighty-four thousand, eight hundred thirty-one".