15213510013 has 4 divisors (see below), whose sum is σ = 16383780028. Its totient is φ = 14043240000.

The previous prime is 15213509989. The next prime is 15213510023. The reversal of 15213510013 is 31001531251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5742911524 + 9470598489 = 75782^2 + 97317^2 .

It is a cyclic number.

It is not a de Polignac number, because 15213510013 - 2⁵ = 15213509981 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 (15213510023) 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, 585134988 + ... + 585135013.

It is an arithmetic number, because the mean of its divisors is an integer number (4095945007).

Almost surely, 2^15213510013 is an apocalyptic number.

15213510013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15213510013 is a deficient number, since it is larger than the sum of its proper divisors (1170270015).

15213510013 is a wasteful number, since it uses less digits than its factorization.

15213510013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170270014.

The product of its (nonzero) digits is 450, while the sum is 22.

The spelling of 15213510013 in words is "fifteen billion, two hundred thirteen million, five hundred ten thousand, thirteen".