131355915 has 8 divisors (see below), whose sum is σ = 210169488. Its totient is φ = 70056480.

The previous prime is 131355899. The next prime is 131355941. The reversal of 131355915 is 519553131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131355915 - 2⁴ = 131355899 is a prime.

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, 4378516 + ... + 4378545.

It is an arithmetic number, because the mean of its divisors is an integer number (26271186).

Almost surely, 2^131355915 is an apocalyptic number.

131355915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131355915 is a deficient number, since it is larger than the sum of its proper divisors (78813573).

131355915 is an equidigital number, since it uses as much as digits as its factorization.

131355915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757069.

The product of its digits is 10125, while the sum is 33.

The square root of 131355915 is about 11461.0608147763. The cubic root of 131355915 is about 508.3348421228.

The spelling of 131355915 in words is "one hundred thirty-one million, three hundred fifty-five thousand, nine hundred fifteen".