15135213 has 4 divisors (see below), whose sum is σ = 20180288. Its totient is φ = 10090140.

The previous prime is 15135209. The next prime is 15135217. The reversal of 15135213 is 31253151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (15135209) and next prime (15135217).

It is not a de Polignac number, because 15135213 - 2² = 15135209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15135213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15135217) 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, 2522533 + ... + 2522538.

It is an arithmetic number, because the mean of its divisors is an integer number (5045072).

Almost surely, 2^15135213 is an apocalyptic number.

It is an amenable number.

15135213 is a deficient number, since it is larger than the sum of its proper divisors (5045075).

15135213 is an equidigital number, since it uses as much as digits as its factorization.

15135213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045074.

The product of its digits is 450, while the sum is 21.

The square root of 15135213 is about 3890.4001079580. The cubic root of 15135213 is about 247.3600228793.

Adding to 15135213 its reverse (31253151), we get a palindrome (46388364).

The spelling of 15135213 in words is "fifteen million, one hundred thirty-five thousand, two hundred thirteen".