15323013 has 20 divisors (see below), whose sum is σ = 23128908. Its totient is φ = 10108800.

The previous prime is 15323003. The next prime is 15323029. The reversal of 15323013 is 31032351.

It can be written as a sum of positive squares in 2 ways, for example, as 7387524 + 7935489 = 2718^2 + 2817^2 .

It is not a de Polignac number, because 15323013 - 2⁴ = 15322997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15323003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7245 + ... + 9117.

Almost surely, 2^15323013 is an apocalyptic number.

It is an amenable number.

15323013 is a deficient number, since it is larger than the sum of its proper divisors (7805895).

15323013 is a wasteful number, since it uses less digits than its factorization.

15323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 15323013 is about 3914.4620320039. The cubic root of 15323013 is about 248.3789137040.

Adding to 15323013 its reverse (31032351), we get a palindrome (46355364).

The spelling of 15323013 in words is "fifteen million, three hundred twenty-three thousand, thirteen".