1318915431 has 12 divisors (see below), whose sum is σ = 1956589752. Its totient is φ = 855512496.

The previous prime is 1318915417. The next prime is 1318915439. The reversal of 1318915431 is 1345198131.

It is a happy number.

1318915431 is a `hidden beast` number, since 1 + 31 + 89 + 1 + 543 + 1 = 666.

It is not a de Polignac number, because 1318915431 - 2¹⁴ = 1318899047 is a prime.

It is a super-2 number, since 2×1318915431² = 3479075828259831522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318915439) 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 11 ways as a sum of consecutive naturals, for example, 1980021 + ... + 1980686.

It is an arithmetic number, because the mean of its divisors is an integer number (163049146).

Almost surely, 2^1318915431 is an apocalyptic number.

1318915431 is a deficient number, since it is larger than the sum of its proper divisors (637674321).

1318915431 is a wasteful number, since it uses less digits than its factorization.

1318915431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960750 (or 3960747 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1318915431 is about 36316.8752923486. The cubic root of 1318915431 is about 1096.6607912378.

The spelling of 1318915431 in words is "one billion, three hundred eighteen million, nine hundred fifteen thousand, four hundred thirty-one".