131009915 has 8 divisors (see below), whose sum is σ = 160557120. Its totient is φ = 102577792.

The previous prime is 131009911. The next prime is 131009927. The reversal of 131009915 is 519900131.

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

It is a cyclic number.

It is not a de Polignac number, because 131009915 - 2² = 131009911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131009911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278510 + ... + 278979.

It is an arithmetic number, because the mean of its divisors is an integer number (20069640).

Almost surely, 2^131009915 is an apocalyptic number.

131009915 is a deficient number, since it is larger than the sum of its proper divisors (29547205).

131009915 is an equidigital number, since it uses as much as digits as its factorization.

131009915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557541.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 131009915 is about 11445.9562728503. The cubic root of 131009915 is about 507.8881206800. Note that the first 3 decimals are identical.

The spelling of 131009915 in words is "one hundred thirty-one million, nine thousand, nine hundred fifteen".