131640544 has 96 divisors (see below), whose sum is σ = 308689920. Its totient is φ = 54093312.

The previous prime is 131640527. The next prime is 131640559. The reversal of 131640544 is 445046131.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760842 + ... + 761014.

It is an arithmetic number, because the mean of its divisors is an integer number (3215520).

Almost surely, 2^131640544 is an apocalyptic number.

131640544 is a gapful number since it is divisible by the number (14) 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 131640544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154344960).

131640544 is an abundant number, since it is smaller than the sum of its proper divisors (177049376).

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

131640544 is a wasteful number, since it uses less digits than its factorization.

131640544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 131640544 is about 11473.4713142972. The cubic root of 131640544 is about 508.7017395920.

Adding to 131640544 its reverse (445046131), we get a palindrome (576686675).

The spelling of 131640544 in words is "one hundred thirty-one million, six hundred forty thousand, five hundred forty-four".