131224566 has 16 divisors (see below), whose sum is σ = 286308288. Its totient is φ = 39765000.

The previous prime is 131224549. The next prime is 131224567. The reversal of 131224566 is 665422131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131224567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 994060 + ... + 994191.

It is an arithmetic number, because the mean of its divisors is an integer number (17894268).

Almost surely, 2^131224566 is an apocalyptic number.

131224566 is an abundant number, since it is smaller than the sum of its proper divisors (155083722).

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

131224566 is a wasteful number, since it uses less digits than its factorization.

131224566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988267.

The product of its digits is 8640, while the sum is 30.

The square root of 131224566 is about 11455.3291528441. The cubic root of 131224566 is about 508.1653495884.

Adding to 131224566 its reverse (665422131), we get a palindrome (796646697).

It can be divided in two parts, 1312 and 24566, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 131224566 in words is "one hundred thirty-one million, two hundred twenty-four thousand, five hundred sixty-six".