2131897915 has 8 divisors (see below), whose sum is σ = 2923745760. Its totient is φ = 1461872832.

The previous prime is 2131897897. The next prime is 2131897919. The reversal of 2131897915 is 5197981312.

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

It is not a de Polignac number, because 2131897915 - 2⁵ = 2131897883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131897919) 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, 30455650 + ... + 30455719.

It is an arithmetic number, because the mean of its divisors is an integer number (365468220).

Almost surely, 2^2131897915 is an apocalyptic number.

2131897915 is a deficient number, since it is larger than the sum of its proper divisors (791847845).

2131897915 is an equidigital number, since it uses as much as digits as its factorization.

2131897915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60911381.

The product of its digits is 136080, while the sum is 46.

The square root of 2131897915 is about 46172.4800611793. The cubic root of 2131897915 is about 1287.0303894511.

The spelling of 2131897915 in words is "two billion, one hundred thirty-one million, eight hundred ninety-seven thousand, nine hundred fifteen".