15397222 has 16 divisors (see below), whose sum is σ = 23814000. Its totient is φ = 7461760.

The previous prime is 15397219. The next prime is 15397229. The reversal of 15397222 is 22279351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15397229) 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, 14154 + ... + 15202.

It is an arithmetic number, because the mean of its divisors is an integer number (1488375).

Almost surely, 2^15397222 is an apocalyptic number.

15397222 is a deficient number, since it is larger than the sum of its proper divisors (8416778).

15397222 is a wasteful number, since it uses less digits than its factorization.

15397222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271.

The product of its digits is 7560, while the sum is 31.

The square root of 15397222 is about 3923.9294081316. The cubic root of 15397222 is about 248.7792326107.

The spelling of 15397222 in words is "fifteen million, three hundred ninety-seven thousand, two hundred twenty-two".