15222290 has 16 divisors (see below), whose sum is σ = 27487512. Its totient is φ = 6069504.

The previous prime is 15222257. The next prime is 15222323. The reversal of 15222290 is 9222251.

It is an interprime number because it is at equal distance from previous prime (15222257) and next prime (15222323).

It can be written as a sum of positive squares in 4 ways, for example, as 5230369 + 9991921 = 2287^2 + 3161^2 .

It is a super-2 number, since 2×15222290² = 463436225688200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112 + ... + 5628.

Almost surely, 2^15222290 is an apocalyptic number.

15222290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15222290 is a deficient number, since it is larger than the sum of its proper divisors (12265222).

15222290 is a wasteful number, since it uses less digits than its factorization.

15222290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 15222290 is about 3901.5753228664. The cubic root of 15222290 is about 247.8334925502.

The spelling of 15222290 in words is "fifteen million, two hundred twenty-two thousand, two hundred ninety".