15215256 has 128 divisors (see below), whose sum is σ = 50112000. Its totient is φ = 4185216.

The previous prime is 15215237. The next prime is 15215261. The reversal of 15215256 is 65251251.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43675 + ... + 44021.

It is an arithmetic number, because the mean of its divisors is an integer number (391500).

Almost surely, 2^15215256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15215256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25056000).

15215256 is an abundant number, since it is smaller than the sum of its proper divisors (34896744).

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

15215256 is a wasteful number, since it uses less digits than its factorization.

15215256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 388 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 15215256 is about 3900.6737879500. The cubic root of 15215256 is about 247.7953132450.

The spelling of 15215256 in words is "fifteen million, two hundred fifteen thousand, two hundred fifty-six".