1218515852 has 24 divisors (see below), whose sum is σ = 2207523360. Its totient is φ = 587825280.

The previous prime is 1218515819. The next prime is 1218515869. The reversal of 1218515852 is 2585158121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209528 + ... + 215264.

It is an arithmetic number, because the mean of its divisors is an integer number (91980140).

Almost surely, 2^1218515852 is an apocalyptic number.

It is an amenable number.

1218515852 is a deficient number, since it is larger than the sum of its proper divisors (989007508).

1218515852 is a wasteful number, since it uses less digits than its factorization.

1218515852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601 (or 7599 counting only the distinct ones).

The product of its digits is 32000, while the sum is 38.

The square root of 1218515852 is about 34907.2464110247. The cubic root of 1218515852 is about 1068.0962602665.

The spelling of 1218515852 in words is "one billion, two hundred eighteen million, five hundred fifteen thousand, eight hundred fifty-two".