213231322 has 8 divisors (see below), whose sum is σ = 320764500. Its totient is φ = 106309824.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231322 is 223132312.

It can be written as a sum of positive squares in 2 ways, for example, as 188540361 + 24690961 = 13731^2 + 4969^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 213231322.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152047 + ... + 153442.

Almost surely, 2^213231322 is an apocalyptic number.

213231322 is a deficient number, since it is larger than the sum of its proper divisors (107533178).

213231322 is a wasteful number, since it uses less digits than its factorization.

213231322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305840.

The product of its digits is 432, while the sum is 19.

The square root of 213231322 is about 14602.4423299666. The cubic root of 213231322 is about 597.4253772577.

Adding to 213231322 its reverse (223132312), we get a palindrome (436363634).

The spelling of 213231322 in words is "two hundred thirteen million, two hundred thirty-one thousand, three hundred twenty-two".