131622720 has 112 divisors (see below), whose sum is σ = 420916608. Its totient is φ = 34846720.

The previous prime is 131622707. The next prime is 131622731. The reversal of 131622720 is 27226131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 159910 + ... + 160730.

It is an arithmetic number, because the mean of its divisors is an integer number (3758184).

Almost surely, 2^131622720 is an apocalyptic number.

131622720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131622720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210458304).

131622720 is an abundant number, since it is smaller than the sum of its proper divisors (289293888).

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

131622720 is a wasteful number, since it uses less digits than its factorization.

131622720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 131622720 is about 11472.6945396450. The cubic root of 131622720 is about 508.6787793176.

Adding to 131622720 its reverse (27226131), we get a palindrome (158848851).

The spelling of 131622720 in words is "one hundred thirty-one million, six hundred twenty-two thousand, seven hundred twenty".