213431522 has 16 divisors (see below), whose sum is σ = 337284000. Its totient is φ = 101013120.

The previous prime is 213431521. The next prime is 213431531. The reversal of 213431522 is 225134312.

213431522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213431521) 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, 77729 + ... + 80427.

It is an arithmetic number, because the mean of its divisors is an integer number (21080250).

Almost surely, 2^213431522 is an apocalyptic number.

213431522 is a deficient number, since it is larger than the sum of its proper divisors (123852478).

213431522 is a wasteful number, since it uses less digits than its factorization.

213431522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4801.

The product of its digits is 1440, while the sum is 23.

The square root of 213431522 is about 14609.2957393572. The cubic root of 213431522 is about 597.6122903047.

Adding to 213431522 its reverse (225134312), we get a palindrome (438565834).

The spelling of 213431522 in words is "two hundred thirteen million, four hundred thirty-one thousand, five hundred twenty-two".