15500131323 has 16 divisors (see below), whose sum is σ = 21522996000. Its totient is φ = 9910127360.

The previous prime is 15500131321. The next prime is 15500131337. The reversal of 15500131323 is 32313100551.

It is a cyclic number.

It is not a de Polignac number, because 15500131323 - 2¹ = 15500131321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15500131293 and 15500131302.

It is not an unprimeable number, because it can be changed into a prime (15500131321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584898 + ... + 610823.

It is an arithmetic number, because the mean of its divisors is an integer number (1345187250).

Almost surely, 2^15500131323 is an apocalyptic number.

15500131323 is a deficient number, since it is larger than the sum of its proper divisors (6022864677).

15500131323 is a wasteful number, since it uses less digits than its factorization.

15500131323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195902.

The product of its (nonzero) digits is 1350, while the sum is 24.

Adding to 15500131323 its reverse (32313100551), we get a palindrome (47813231874).

The spelling of 15500131323 in words is "fifteen billion, five hundred million, one hundred thirty-one thousand, three hundred twenty-three".