15323213 has 4 divisors (see below), whose sum is σ = 15364668. Its totient is φ = 15281760.

The previous prime is 15323183. The next prime is 15323227. The reversal of 15323213 is 31232351.

15323213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31232351 = 97 ⋅321983.

It can be written as a sum of positive squares in 2 ways, for example, as 7382089 + 7941124 = 2717^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 15323213 - 2¹⁴ = 15306829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15323293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20168 + ... + 20913.

It is an arithmetic number, because the mean of its divisors is an integer number (3841167).

Almost surely, 2^15323213 is an apocalyptic number.

It is an amenable number.

15323213 is a deficient number, since it is larger than the sum of its proper divisors (41455).

15323213 is an equidigital number, since it uses as much as digits as its factorization.

15323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41454.

The product of its digits is 540, while the sum is 20.

The square root of 15323213 is about 3914.4875782151. The cubic root of 15323213 is about 248.3799943350.

Adding to 15323213 its reverse (31232351), we get a palindrome (46555564).

The spelling of 15323213 in words is "fifteen million, three hundred twenty-three thousand, two hundred thirteen".