131213222 has 16 divisors (see below), whose sum is σ = 225089280. Its totient is φ = 56196168.

The previous prime is 131213177. The next prime is 131213249. The reversal of 131213222 is 222312131.

It is a self number, because there is not a number n which added to its sum of digits gives 131213222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30743 + ... + 34749.

It is an arithmetic number, because the mean of its divisors is an integer number (14068080).

Almost surely, 2^131213222 is an apocalyptic number.

131213222 is a deficient number, since it is larger than the sum of its proper divisors (93876058).

131213222 is a wasteful number, since it uses less digits than its factorization.

131213222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6355.

The product of its digits is 144, while the sum is 17.

The square root of 131213222 is about 11454.8340014162. The cubic root of 131213222 is about 508.1507060045.

Adding to 131213222 its reverse (222312131), we get a palindrome (353525353).

The spelling of 131213222 in words is "one hundred thirty-one million, two hundred thirteen thousand, two hundred twenty-two".