2113947515 has 4 divisors (see below), whose sum is σ = 2536737024. Its totient is φ = 1691158008.

The previous prime is 2113947509. The next prime is 2113947527. The reversal of 2113947515 is 5157493112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113947515 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211394747 + ... + 211394756.

It is an arithmetic number, because the mean of its divisors is an integer number (634184256).

Almost surely, 2^2113947515 is an apocalyptic number.

2113947515 is a deficient number, since it is larger than the sum of its proper divisors (422789509).

2113947515 is an equidigital number, since it uses as much as digits as its factorization.

2113947515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422789508.

The product of its digits is 37800, while the sum is 38.

The square root of 2113947515 is about 45977.6849678189. The cubic root of 2113947515 is about 1283.4079745571.

The spelling of 2113947515 in words is "two billion, one hundred thirteen million, nine hundred forty-seven thousand, five hundred fifteen".