131231225424 has 80 divisors (see below), whose sum is σ = 365143004352. Its totient is φ = 40373197824.

The previous prime is 131231225417. The next prime is 131231225441. The reversal of 131231225424 is 424522132131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131231225391 and 131231225400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7696012 + ... + 7713044.

Almost surely, 2^131231225424 is an apocalyptic number.

It is an amenable number.

131231225424 is an abundant number, since it is smaller than the sum of its proper divisors (233911778928).

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

131231225424 is a wasteful number, since it uses less digits than its factorization.

131231225424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29404 (or 29398 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 131231225424 its reverse (424522132131), we get a palindrome (555753357555).

The spelling of 131231225424 in words is "one hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-five thousand, four hundred twenty-four".