13997515 has 16 divisors (see below), whose sum is σ = 19261440. Its totient is φ = 9565920.

The previous prime is 13997497. The next prime is 13997519. The reversal of 13997515 is 51579931.

It is not a de Polignac number, because 13997515 - 2⁵ = 13997483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13997519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14910 + ... + 15820.

It is an arithmetic number, because the mean of its divisors is an integer number (1203840).

Almost surely, 2^13997515 is an apocalyptic number.

13997515 is a deficient number, since it is larger than the sum of its proper divisors (5263925).

13997515 is an equidigital number, since it uses as much as digits as its factorization.

13997515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362.

The product of its digits is 42525, while the sum is 40.

The square root of 13997515 is about 3741.3252999439. The cubic root of 13997515 is about 240.9999655653. Note that the first 4 decimals are identical.

The spelling of 13997515 in words is "thirteen million, nine hundred ninety-seven thousand, five hundred fifteen".