15331265 has 4 divisors (see below), whose sum is σ = 18397524. Its totient is φ = 12265008.

The previous prime is 15331223. The next prime is 15331279. The reversal of 15331265 is 56213351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56213351 = 181 ⋅310571.

It can be written as a sum of positive squares in 2 ways, for example, as 6235009 + 9096256 = 2497^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 15331265 - 2⁶ = 15331201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1533122 + ... + 1533131.

It is an arithmetic number, because the mean of its divisors is an integer number (4599381).

Almost surely, 2^15331265 is an apocalyptic number.

It is an amenable number.

15331265 is a deficient number, since it is larger than the sum of its proper divisors (3066259).

15331265 is an equidigital number, since it uses as much as digits as its factorization.

15331265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066258.

The product of its digits is 2700, while the sum is 26.

The square root of 15331265 is about 3915.5159302447. The cubic root of 15331265 is about 248.4234927298.

The spelling of 15331265 in words is "fifteen million, three hundred thirty-one thousand, two hundred sixty-five".