131878520 has 32 divisors (see below), whose sum is σ = 314182800. Its totient is φ = 49648128.

The previous prime is 131878517. The next prime is 131878531. The reversal of 131878520 is 25878131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96290 + ... + 97649.

Almost surely, 2^131878520 is an apocalyptic number.

131878520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131878520 is an abundant number, since it is smaller than the sum of its proper divisors (182304280).

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

131878520 is a wasteful number, since it uses less digits than its factorization.

131878520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193967 (or 193963 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 131878520 is about 11483.8373377543. The cubic root of 131878520 is about 509.0080938651.

The spelling of 131878520 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, five hundred twenty".