15122272 has 24 divisors (see below), whose sum is σ = 32479272. Its totient is φ = 6873600.

The previous prime is 15122267. The next prime is 15122273. The reversal of 15122272 is 27222151.

It is a super-2 number, since 2×15122272² = 457366220883968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15122273) 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, 21129 + ... + 21832.

It is an arithmetic number, because the mean of its divisors is an integer number (1353303).

Almost surely, 2^15122272 is an apocalyptic number.

It is an amenable number.

15122272 is an abundant number, since it is smaller than the sum of its proper divisors (17357000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15122272 is a wasteful number, since it uses less digits than its factorization.

15122272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42982 (or 42974 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 15122272 is about 3888.7365557466. The cubic root of 15122272 is about 247.2895030298.

Subtracting from 15122272 its sum of digits (22), we obtain a triangular number (15122250 = T₅₄₉₉).

The spelling of 15122272 in words is "fifteen million, one hundred twenty-two thousand, two hundred seventy-two".