13515250051 has 4 divisors (see below), whose sum is σ = 13535947872. Its totient is φ = 13494552232.

The previous prime is 13515250043. The next prime is 13515250081. The reversal of 13515250051 is 15005251531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15005251531 = 6379 ⋅2352289.

It is a cyclic number.

It is not a de Polignac number, because 13515250051 - 2³ = 13515250043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13515250081) 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, 10347931 + ... + 10349236.

It is an arithmetic number, because the mean of its divisors is an integer number (3383986968).

Almost surely, 2^13515250051 is an apocalyptic number.

13515250051 is a deficient number, since it is larger than the sum of its proper divisors (20697821).

13515250051 is an equidigital number, since it uses as much as digits as its factorization.

13515250051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20697820.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 13515250051 in words is "thirteen billion, five hundred fifteen million, two hundred fifty thousand, fifty-one".