1318168215 has 128 divisors (see below), whose sum is σ = 2933145600. Its totient is φ = 546808320.

The previous prime is 1318168177. The next prime is 1318168217. The reversal of 1318168215 is 5128618131.

It is not a de Polignac number, because 1318168215 - 2⁷ = 1318168087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1318168215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318168217) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 748506 + ... + 750264.

It is an arithmetic number, because the mean of its divisors is an integer number (22915200).

Almost surely, 2^1318168215 is an apocalyptic number.

1318168215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1318168215 is an abundant number, since it is smaller than the sum of its proper divisors (1614977385).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1318168215 is a wasteful number, since it uses less digits than its factorization.

1318168215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1848 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1318168215 is about 36306.5863859438. The cubic root of 1318168215 is about 1096.4536520314.

The spelling of 1318168215 in words is "one billion, three hundred eighteen million, one hundred sixty-eight thousand, two hundred fifteen".