131300240 has 20 divisors (see below), whose sum is σ = 305273244. Its totient is φ = 52520064.

The previous prime is 131300219. The next prime is 131300251. The reversal of 131300240 is 42003131.

It can be written as a sum of positive squares in 2 ways, for example, as 35808256 + 95491984 = 5984^2 + 9772^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820547 + ... + 820706.

Almost surely, 2^131300240 is an apocalyptic number.

131300240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131300240 is an abundant number, since it is smaller than the sum of its proper divisors (173973004).

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

131300240 is a wasteful number, since it uses less digits than its factorization.

131300240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641266 (or 1641260 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 131300240 is about 11458.6316809644. The cubic root of 131300240 is about 508.2630129966.

Adding to 131300240 its reverse (42003131), we get a palindrome (173303371).

The spelling of 131300240 in words is "one hundred thirty-one million, three hundred thousand, two hundred forty".