131540544 has 56 divisors (see below), whose sum is σ = 386709920. Its totient is φ = 43846272.

The previous prime is 131540537. The next prime is 131540551. The reversal of 131540544 is 445045131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (131540537) and next prime (131540551).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 36334 + ... + 39789.

Almost surely, 2^131540544 is an apocalyptic number.

It is an amenable number.

131540544 is an abundant number, since it is smaller than the sum of its proper divisors (255169376).

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

131540544 is an equidigital number, since it uses as much as digits as its factorization.

131540544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76144 (or 76128 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 131540544 is about 11469.1126073467. The cubic root of 131540544 is about 508.5728961549.

Adding to 131540544 its reverse (445045131), we get a palindrome (576585675).

The spelling of 131540544 in words is "one hundred thirty-one million, five hundred forty thousand, five hundred forty-four".