15222889 has 12 divisors (see below), whose sum is σ = 16918132. Its totient is φ = 13685760.

The previous prime is 15222887. The next prime is 15222901. The reversal of 15222889 is 98822251.

It can be written as a sum of positive squares in 2 ways, for example, as 12390400 + 2832489 = 3520^2 + 1683^2 .

It is not a de Polignac number, because 15222889 - 2¹ = 15222887 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (15222887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11089 + ... + 12385.

Almost surely, 2^15222889 is an apocalyptic number.

It is an amenable number.

15222889 is a deficient number, since it is larger than the sum of its proper divisors (1695243).

15222889 is a wasteful number, since it uses less digits than its factorization.

15222889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 1405 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 15222889 is about 3901.6520859759. The cubic root of 15222889 is about 247.8367432725.

The spelling of 15222889 in words is "fifteen million, two hundred twenty-two thousand, eight hundred eighty-nine".