131208720 has 80 divisors (see below), whose sum is σ = 430686720. Its totient is φ = 32929792.

The previous prime is 131208689. The next prime is 131208751. The reversal of 131208720 is 27802131.

It is an interprime number because it is at equal distance from previous prime (131208689) and next prime (131208751).

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12000 + ... + 20159.

It is an arithmetic number, because the mean of its divisors is an integer number (5383584).

Almost surely, 2^131208720 is an apocalyptic number.

131208720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131208720 is an abundant number, since it is smaller than the sum of its proper divisors (299478000).

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

131208720 is a wasteful number, since it uses less digits than its factorization.

131208720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32192 (or 32186 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 131208720 is about 11454.6374888078. The cubic root of 131208720 is about 508.1448942918.

The spelling of 131208720 in words is "one hundred thirty-one million, two hundred eight thousand, seven hundred twenty".