131225564 has 12 divisors (see below), whose sum is σ = 229763688. Its totient is φ = 65578800.

The previous prime is 131225539. The next prime is 131225581. The reversal of 131225564 is 465522131.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1499 + ... + 16269.

It is an arithmetic number, because the mean of its divisors is an integer number (19146974).

Almost surely, 2^131225564 is an apocalyptic number.

It is an amenable number.

131225564 is a deficient number, since it is larger than the sum of its proper divisors (98538124).

131225564 is a wasteful number, since it uses less digits than its factorization.

131225564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16996 (or 16994 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 131225564 is about 11455.3727132730. The cubic root of 131225564 is about 508.1666378323.

Adding to 131225564 its reverse (465522131), we get a palindrome (596747695).

The spelling of 131225564 in words is "one hundred thirty-one million, two hundred twenty-five thousand, five hundred sixty-four".