131225656 has 32 divisors (see below), whose sum is σ = 251475840. Its totient is φ = 64181728.

The previous prime is 131225651. The next prime is 131225693. The reversal of 131225656 is 656522131.

131225656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131225651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70125 + ... + 71971.

It is an arithmetic number, because the mean of its divisors is an integer number (7858620).

Almost surely, 2^131225656 is an apocalyptic number.

It is an amenable number.

131225656 is a deficient number, since it is larger than the sum of its proper divisors (120250184).

131225656 is a wasteful number, since it uses less digits than its factorization.

131225656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043 (or 2039 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 131225656 is about 11455.3767288553. The cubic root of 131225656 is about 508.1667565879.

Adding to 131225656 its reverse (656522131), we get a palindrome (787747787).

The spelling of 131225656 in words is "one hundred thirty-one million, two hundred twenty-five thousand, six hundred fifty-six".