15315872 has 48 divisors (see below), whose sum is σ = 35435232. Its totient is φ = 6424320.

The previous prime is 15315871. The next prime is 15315877. The reversal of 15315872 is 27851351.

15315872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (15315871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2903 + ... + 6249.

It is an arithmetic number, because the mean of its divisors is an integer number (738234).

Almost surely, 2^15315872 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 15315872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17717616).

15315872 is an abundant number, since it is smaller than the sum of its proper divisors (20119360).

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

15315872 is a wasteful number, since it uses less digits than its factorization.

15315872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381 (or 3373 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 15315872 is about 3913.5497952626. The cubic root of 15315872 is about 248.3403236125.

The spelling of 15315872 in words is "fifteen million, three hundred fifteen thousand, eight hundred seventy-two".