1218483915 has 32 divisors (see below), whose sum is σ = 2144420352. Its totient is φ = 590770400.

The previous prime is 1218483911. The next prime is 1218483941. The reversal of 1218483915 is 5193848121.

It is not a de Polignac number, because 1218483915 - 2² = 1218483911 is a prime.

It is a super-2 number, since 2×1218483915² = 2969406102227454450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218483911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10551 + ... + 50480.

It is an arithmetic number, because the mean of its divisors is an integer number (67013136).

Almost surely, 2^1218483915 is an apocalyptic number.

1218483915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1218483915 is a deficient number, since it is larger than the sum of its proper divisors (925936437).

1218483915 is an equidigital number, since it uses as much as digits as its factorization.

1218483915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61072 (or 61050 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 1218483915 is about 34906.7889528670. The cubic root of 1218483915 is about 1068.0869286718.

The spelling of 1218483915 in words is "one billion, two hundred eighteen million, four hundred eighty-three thousand, nine hundred fifteen".