131222424 has 32 divisors (see below), whose sum is σ = 336924720. Its totient is φ = 42558336.

The previous prime is 131222423. The next prime is 131222447. The reversal of 131222424 is 424222131.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 131222424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222423) 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, 72999 + ... + 74774.

Almost surely, 2^131222424 is an apocalyptic number.

It is an amenable number.

131222424 is an abundant number, since it is smaller than the sum of its proper divisors (205702296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131222424 is a wasteful number, since it uses less digits than its factorization.

131222424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147819 (or 147815 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 131222424 is about 11455.2356588592. The cubic root of 131222424 is about 508.1625846181.

Adding to 131222424 its reverse (424222131), we get a palindrome (555444555).

The spelling of 131222424 in words is "one hundred thirty-one million, two hundred twenty-two thousand, four hundred twenty-four".