15222994 has 4 divisors (see below), whose sum is σ = 22834494. Its totient is φ = 7611496.

The previous prime is 15222983. The next prime is 15223027. The reversal of 15222994 is 49922251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49922251 = 17 ⋅2936603.

It can be written as a sum of positive squares in only one way, i.e., 11662225 + 3560769 = 3415^2 + 1887^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3805747 + ... + 3805750.

Almost surely, 2^15222994 is an apocalyptic number.

15222994 is a deficient number, since it is larger than the sum of its proper divisors (7611500).

15222994 is an equidigital number, since it uses as much as digits as its factorization.

15222994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7611499.

The product of its digits is 12960, while the sum is 34.

The square root of 15222994 is about 3901.6655417911. The cubic root of 15222994 is about 247.8373130899.

The spelling of 15222994 in words is "fifteen million, two hundred twenty-two thousand, nine hundred ninety-four".