13157815 has 8 divisors (see below), whose sum is σ = 17224848. Its totient is φ = 9569280.

The previous prime is 13157803. The next prime is 13157819. The reversal of 13157815 is 51875131.

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

It is not a de Polignac number, because 13157815 - 2⁵ = 13157783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119562 + ... + 119671.

It is an arithmetic number, because the mean of its divisors is an integer number (2153106).

Almost surely, 2^13157815 is an apocalyptic number.

13157815 is a deficient number, since it is larger than the sum of its proper divisors (4067033).

13157815 is a wasteful number, since it uses less digits than its factorization.

13157815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239249.

The product of its digits is 4200, while the sum is 31.

The square root of 13157815 is about 3627.3702595682. The cubic root of 13157815 is about 236.0811209686.

The spelling of 13157815 in words is "thirteen million, one hundred fifty-seven thousand, eight hundred fifteen".