15397223 has 4 divisors (see below), whose sum is σ = 16302960. Its totient is φ = 14491488.

The previous prime is 15397219. The next prime is 15397229. The reversal of 15397223 is 32279351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32279351 = 13 ⋅2483027.

It is a cyclic number.

It is not a de Polignac number, because 15397223 - 2² = 15397219 is a prime.

It is a super-2 number, since 2×15397223² = 474148952223458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15397223.

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 3 ways as a sum of consecutive naturals, for example, 452843 + ... + 452876.

It is an arithmetic number, because the mean of its divisors is an integer number (4075740).

Almost surely, 2^15397223 is an apocalyptic number.

15397223 is a deficient number, since it is larger than the sum of its proper divisors (905737).

15397223 is an equidigital number, since it uses as much as digits as its factorization.

15397223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905736.

The product of its digits is 11340, while the sum is 32.

The square root of 15397223 is about 3923.9295355549. The cubic root of 15397223 is about 248.7792379965.

The spelling of 15397223 in words is "fifteen million, three hundred ninety-seven thousand, two hundred twenty-three".