15320052 has 54 divisors (see below), whose sum is σ = 42578354. Its totient is φ = 4641120.

The previous prime is 15320051. The next prime is 15320069. The reversal of 15320052 is 25002351.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15163236 + 156816 = 3894^2 + 396^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15320051) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2598 + ... + 6114.

Almost surely, 2^15320052 is an apocalyptic number.

15320052 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 15320052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21289177).

15320052 is an abundant number, since it is smaller than the sum of its proper divisors (27258302).

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

15320052 is a wasteful number, since it uses less digits than its factorization.

15320052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549 (or 3533 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 15320052 is about 3914.0838008402. The cubic root of 15320052 is about 248.3629138624.

The spelling of 15320052 in words is "fifteen million, three hundred twenty thousand, fifty-two".