319716821247 has 16 divisors (see below), whose sum is σ = 428786346240. Its totient is φ = 211896565632.

The previous prime is 319716821243. The next prime is 319716821251. The reversal of 319716821247 is 742128617913.

It is an interprime number because it is at equal distance from previous prime (319716821243) and next prime (319716821251).

It is not a de Polignac number, because 319716821247 - 2² = 319716821243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 319716821247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319716821243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1958358 + ... + 2115324.

It is an arithmetic number, because the mean of its divisors is an integer number (26799146640).

Almost surely, 2^319716821247 is an apocalyptic number.

319716821247 is a deficient number, since it is larger than the sum of its proper divisors (109069524993).

319716821247 is a wasteful number, since it uses less digits than its factorization.

319716821247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160942.

The product of its digits is 1016064, while the sum is 51.

The spelling of 319716821247 in words is "three hundred nineteen billion, seven hundred sixteen million, eight hundred twenty-one thousand, two hundred forty-seven".