213831589 has 2 divisors, whose sum is σ = 213831590. Its totient is φ = 213831588.

The previous prime is 213831557. The next prime is 213831637. The reversal of 213831589 is 985138312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185422689 + 28408900 = 13617^2 + 5330^2 .

It is a cyclic number.

It is not a de Polignac number, because 213831589 - 2⁵ = 213831557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213831509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106915794 + 106915795.

It is an arithmetic number, because the mean of its divisors is an integer number (106915795).

Almost surely, 2^213831589 is an apocalyptic number.

It is an amenable number.

213831589 is a deficient number, since it is larger than the sum of its proper divisors (1).

213831589 is an equidigital number, since it uses as much as digits as its factorization.

213831589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 213831589 is about 14622.9815359249. The cubic root of 213831589 is about 597.9854556255.

The spelling of 213831589 in words is "two hundred thirteen million, eight hundred thirty-one thousand, five hundred eighty-nine".