15001321317 has 4 divisors (see below), whose sum is σ = 20001761760. Its totient is φ = 10000880876.

The previous prime is 15001321261. The next prime is 15001321327. The reversal of 15001321317 is 71312310051.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 15001321317 - 2¹⁸ = 15001059173 is a prime.

It is a super-2 number, since 2×15001321317² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15001321327) 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 3 ways as a sum of consecutive naturals, for example, 2500220217 + ... + 2500220222.

It is an arithmetic number, because the mean of its divisors is an integer number (5000440440).

Almost surely, 2^15001321317 is an apocalyptic number.

It is an amenable number.

15001321317 is a deficient number, since it is larger than the sum of its proper divisors (5000440443).

15001321317 is an equidigital number, since it uses as much as digits as its factorization.

15001321317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000440442.

The product of its (nonzero) digits is 630, while the sum is 24.

Adding to 15001321317 its reverse (71312310051), we get a palindrome (86313631368).

The spelling of 15001321317 in words is "fifteen billion, one million, three hundred twenty-one thousand, three hundred seventeen".