15231002317 has 2 divisors, whose sum is σ = 15231002318. Its totient is φ = 15231002316.

The previous prime is 15231002261. The next prime is 15231002323. The reversal of 15231002317 is 71320013251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15182921961 + 48080356 = 123219^2 + 6934^2 .

It is a cyclic number.

It is not a de Polignac number, because 15231002317 - 2²⁷ = 15096784589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15231002291 and 15231002300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15231002387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7615501158 + 7615501159.

It is an arithmetic number, because the mean of its divisors is an integer number (7615501159).

Almost surely, 2^15231002317 is an apocalyptic number.

It is an amenable number.

15231002317 is a deficient number, since it is larger than the sum of its proper divisors (1).

15231002317 is an equidigital number, since it uses as much as digits as its factorization.

15231002317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

Adding to 15231002317 its reverse (71320013251), we get a palindrome (86551015568).

The spelling of 15231002317 in words is "fifteen billion, two hundred thirty-one million, two thousand, three hundred seventeen".