2115251315 has 4 divisors (see below), whose sum is σ = 2538301584. Its totient is φ = 1692201048.

The previous prime is 2115251293. The next prime is 2115251317. The reversal of 2115251315 is 5131525112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2115251315 - 2⁸ = 2115251059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115251317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211525127 + ... + 211525136.

It is an arithmetic number, because the mean of its divisors is an integer number (634575396).

Almost surely, 2^2115251315 is an apocalyptic number.

2115251315 is a deficient number, since it is larger than the sum of its proper divisors (423050269).

2115251315 is an equidigital number, since it uses as much as digits as its factorization.

2115251315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423050268.

The product of its digits is 1500, while the sum is 26.

The square root of 2115251315 is about 45991.8613995998. The cubic root of 2115251315 is about 1283.6717722488.

Adding to 2115251315 its reverse (5131525112), we get a palindrome (7246776427).

The spelling of 2115251315 in words is "two billion, one hundred fifteen million, two hundred fifty-one thousand, three hundred fifteen".