13515970 has 16 divisors (see below), whose sum is σ = 26200440. Its totient is φ = 4990464.

The previous prime is 13515967. The next prime is 13515979. The reversal of 13515970 is 7951531.

13515970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7469289 + 6046681 = 2733^2 + 2459^2 .

It is not an unprimeable number, because it can be changed into a prime (13515979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51855 + ... + 52114.

Almost surely, 2^13515970 is an apocalyptic number.

13515970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13515970 is a deficient number, since it is larger than the sum of its proper divisors (12684470).

13515970 is a wasteful number, since it uses less digits than its factorization.

13515970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103989.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 13515970 is about 3676.4072135714. The cubic root of 13515970 is about 238.2040126286.

The spelling of 13515970 in words is "thirteen million, five hundred fifteen thousand, nine hundred seventy".