131225512 has 16 divisors (see below), whose sum is σ = 268416000. Its totient is φ = 59647920.

The previous prime is 131225491. The next prime is 131225519. The reversal of 131225512 is 215522131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (131225519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745512 + ... + 745687.

It is an arithmetic number, because the mean of its divisors is an integer number (16776000).

Almost surely, 2^131225512 is an apocalyptic number.

It is an amenable number.

131225512 is an abundant number, since it is smaller than the sum of its proper divisors (137190488).

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

131225512 is a wasteful number, since it uses less digits than its factorization.

131225512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491216 (or 1491212 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 131225512 is about 11455.3704435954. The cubic root of 131225512 is about 508.1665707096.

Adding to 131225512 its reverse (215522131), we get a palindrome (346747643).

The spelling of 131225512 in words is "one hundred thirty-one million, two hundred twenty-five thousand, five hundred twelve".