13315251085 has 4 divisors (see below), whose sum is σ = 15978301308. Its totient is φ = 10652200864.

The previous prime is 13315251077. The next prime is 13315251113. The reversal of 13315251085 is 58015251331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3168113796 + 10147137289 = 56286^2 + 100733^2 .

It is a cyclic number.

It is not a de Polignac number, because 13315251085 - 2³ = 13315251077 is a prime.

It is a super-2 number, since 2×13315251085² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13315251085.

It is a congruent 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, 1331525104 + ... + 1331525113.

It is an arithmetic number, because the mean of its divisors is an integer number (3994575327).

Almost surely, 2^13315251085 is an apocalyptic number.

It is an amenable number.

13315251085 is a deficient number, since it is larger than the sum of its proper divisors (2663050223).

13315251085 is an equidigital number, since it uses as much as digits as its factorization.

13315251085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663050222.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 13315251085 in words is "thirteen billion, three hundred fifteen million, two hundred fifty-one thousand, eighty-five".