131213224 has 16 divisors (see below), whose sum is σ = 246244320. Its totient is φ = 65548080.

The previous prime is 131213177. The next prime is 131213249. The reversal of 131213224 is 422312131.

It is a happy number.

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, 3079 + ... + 16489.

It is an arithmetic number, because the mean of its divisors is an integer number (15390270).

Almost surely, 2^131213224 is an apocalyptic number.

It is an amenable number.

131213224 is a deficient number, since it is larger than the sum of its proper divisors (115031096).

131213224 is a wasteful number, since it uses less digits than its factorization.

131213224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14640 (or 14636 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 131213224 is about 11454.8340887156. The cubic root of 131213224 is about 508.1507085863.

Adding to 131213224 its reverse (422312131), we get a palindrome (553525355).

The spelling of 131213224 in words is "one hundred thirty-one million, two hundred thirteen thousand, two hundred twenty-four".