131303840 has 24 divisors (see below), whose sum is σ = 310205700. Its totient is φ = 52521472.

The previous prime is 131303827. The next prime is 131303899. The reversal of 131303840 is 48303131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123032464 + 8271376 = 11092^2 + 2876^2 .

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 3 ways as a sum of consecutive naturals, for example, 410165 + ... + 410484.

Almost surely, 2^131303840 is an apocalyptic number.

131303840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131303840 is an abundant number, since it is smaller than the sum of its proper divisors (178901860).

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

131303840 is an equidigital number, since it uses as much as digits as its factorization.

131303840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820664 (or 820656 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 131303840 is about 11458.7887667065. The cubic root of 131303840 is about 508.2676581521.

Adding to 131303840 its reverse (48303131), we get a palindrome (179606971).

The spelling of 131303840 in words is "one hundred thirty-one million, three hundred three thousand, eight hundred forty".