15220513323 has 24 divisors (see below), whose sum is σ = 23227214400. Its totient is φ = 9588655104.

The previous prime is 15220513313. The next prime is 15220513349. The reversal of 15220513323 is 32331502251.

It is a happy number.

15220513323 is a `hidden beast` number, since 1 + 522 + 0 + 5 + 133 + 2 + 3 = 666.

It is not a de Polignac number, because 15220513323 - 2²⁰ = 15219464747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15220513303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 608118 + ... + 632651.

It is an arithmetic number, because the mean of its divisors is an integer number (967800600).

Almost surely, 2^15220513323 is an apocalyptic number.

15220513323 is a deficient number, since it is larger than the sum of its proper divisors (8006701077).

15220513323 is a wasteful number, since it uses less digits than its factorization.

15220513323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240851 (or 1240848 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 15220513323 in words is "fifteen billion, two hundred twenty million, five hundred thirteen thousand, three hundred twenty-three".