15813252 has 96 divisors (see below), whose sum is σ = 50489600. Its totient is φ = 4167936.

The previous prime is 15813241. The next prime is 15813257. The reversal of 15813252 is 25231851.

It is a happy number.

15813252 is a `hidden beast` number, since 1 + 581 + 32 + 52 = 666.

It is a Cunningham number, because it is equal to 251³+1.

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

It is not an unprimeable number, because it can be changed into a prime (15813257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9024 + ... + 10632.

Almost surely, 2^15813252 is an apocalyptic number.

15813252 is a gapful number since it is divisible by the number (12) 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 15813252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25244800).

15813252 is an abundant number, since it is smaller than the sum of its proper divisors (34676348).

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

15813252 is a wasteful number, since it uses less digits than its factorization.

15813252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642 (or 1634 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 15813252 is about 3976.5879846924. The cubic root of 15813252 is about 251.0000052909. Note that the first 5 decimals are identical.

The spelling of 15813252 in words is "fifteen million, eight hundred thirteen thousand, two hundred fifty-two".