15319671997 has 16 divisors (see below), whose sum is σ = 17606413440. Its totient is φ = 13057691328.

The previous prime is 15319671959. The next prime is 15319672001. The reversal of 15319671997 is 79917691351.

It is a cyclic number.

It is not a de Polignac number, because 15319671997 - 2²⁷ = 15185454269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15319671947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921523 + ... + 937999.

It is an arithmetic number, because the mean of its divisors is an integer number (1100400840).

Almost surely, 2^15319671997 is an apocalyptic number.

It is an amenable number.

15319671997 is a deficient number, since it is larger than the sum of its proper divisors (2286741443).

15319671997 is a wasteful number, since it uses less digits than its factorization.

15319671997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17220.

The product of its digits is 3214890, while the sum is 58.

The spelling of 15319671997 in words is "fifteen billion, three hundred nineteen million, six hundred seventy-one thousand, nine hundred ninety-seven".