15220256 has 48 divisors (see below), whose sum is σ = 31530240. Its totient is φ = 7223040.

The previous prime is 15220243. The next prime is 15220267. The reversal of 15220256 is 65202251.

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, 66350 + ... + 66578.

It is an arithmetic number, because the mean of its divisors is an integer number (656880).

Almost surely, 2^15220256 is an apocalyptic number.

15220256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15220256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15765120).

15220256 is an abundant number, since it is smaller than the sum of its proper divisors (16309984).

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

15220256 is a wasteful number, since it uses less digits than its factorization.

15220256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 15220256 is about 3901.3146502173. The cubic root of 15220256 is about 247.8224535677.

The spelling of 15220256 in words is "fifteen million, two hundred twenty thousand, two hundred fifty-six".