318516971397 has 8 divisors (see below), whose sum is σ = 424698421056. Its totient is φ = 212340084672.

The previous prime is 318516971393. The next prime is 318516971407. The reversal of 318516971397 is 793179615813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 318516971397 - 2² = 318516971393 is a prime.

It is a super-2 number, since 2×318516971397² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 318516971397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318516971393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974388 + ... + 1259549.

It is an arithmetic number, because the mean of its divisors is an integer number (53087302632).

Almost surely, 2^318516971397 is an apocalyptic number.

It is an amenable number.

318516971397 is a deficient number, since it is larger than the sum of its proper divisors (106181449659).

318516971397 is a wasteful number, since it uses less digits than its factorization.

318516971397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281467.

The product of its digits is 8573040, while the sum is 60.

The spelling of 318516971397 in words is "three hundred eighteen billion, five hundred sixteen million, nine hundred seventy-one thousand, three hundred ninety-seven".