13815194 has 16 divisors (see below), whose sum is σ = 21534120. Its totient is φ = 6639360.

The previous prime is 13815173. The next prime is 13815209. The reversal of 13815194 is 49151831.

It can be written as a sum of positive squares in 4 ways, for example, as 2839225 + 10975969 = 1685^2 + 3313^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13815194.

It is an unprimeable number.

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, 17774 + ... + 18534.

Almost surely, 2^13815194 is an apocalyptic number.

13815194 is a deficient number, since it is larger than the sum of its proper divisors (7718926).

13815194 is a wasteful number, since it uses less digits than its factorization.

13815194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105.

The product of its digits is 4320, while the sum is 32.

The square root of 13815194 is about 3716.8796052603. The cubic root of 13815194 is about 239.9490285272.

The spelling of 13815194 in words is "thirteen million, eight hundred fifteen thousand, one hundred ninety-four".