131423644 has 24 divisors (see below), whose sum is σ = 251387136. Its totient is φ = 59622000.

The previous prime is 131423641. The next prime is 131423659. The reversal of 131423644 is 446324131.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131423641) 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, 22509 + ... + 27739.

It is an arithmetic number, because the mean of its divisors is an integer number (10474464).

Almost surely, 2^131423644 is an apocalyptic number.

It is an amenable number.

131423644 is a deficient number, since it is larger than the sum of its proper divisors (119963492).

131423644 is a wasteful number, since it uses less digits than its factorization.

131423644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5817 (or 5815 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 131423644 is about 11464.0151779383. The cubic root of 131423644 is about 508.4221953642.

Adding to 131423644 its reverse (446324131), we get a palindrome (577747775).

The spelling of 131423644 in words is "one hundred thirty-one million, four hundred twenty-three thousand, six hundred forty-four".