13215194 has 4 divisors (see below), whose sum is σ = 19822794. Its totient is φ = 6607596.

The previous prime is 13215193. The next prime is 13215221. The reversal of 13215194 is 49151231.

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

It can be written as a sum of positive squares in only one way, i.e., 8094025 + 5121169 = 2845^2 + 2263^2 .

It is not an unprimeable number, because it can be changed into a prime (13215193) 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 as a sum of consecutive naturals, namely, 3303797 + ... + 3303800.

Almost surely, 2^13215194 is an apocalyptic number.

13215194 is a deficient number, since it is larger than the sum of its proper divisors (6607600).

13215194 is an equidigital number, since it uses as much as digits as its factorization.

13215194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607599.

The product of its digits is 1080, while the sum is 26.

The square root of 13215194 is about 3635.2708289755. The cubic root of 13215194 is about 236.4237932501.

The spelling of 13215194 in words is "thirteen million, two hundred fifteen thousand, one hundred ninety-four".