318015547231 has 2 divisors, whose sum is σ = 318015547232. Its totient is φ = 318015547230.

The previous prime is 318015547189. The next prime is 318015547253. The reversal of 318015547231 is 132745510813.

It is a strong prime.

It is an emirp because it is prime and its reverse (132745510813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318015547231 is a prime.

It is a super-2 number, since 2×318015547231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318015557231) 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 as a sum of consecutive naturals, namely, 159007773615 + 159007773616.

It is an arithmetic number, because the mean of its divisors is an integer number (159007773616).

Almost surely, 2^318015547231 is an apocalyptic number.

318015547231 is a deficient number, since it is larger than the sum of its proper divisors (1).

318015547231 is an equidigital number, since it uses as much as digits as its factorization.

318015547231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 318015547231 in words is "three hundred eighteen billion, fifteen million, five hundred forty-seven thousand, two hundred thirty-one".