1215063818 has 16 divisors (see below), whose sum is σ = 1855388160. Its totient is φ = 596622336.

The previous prime is 1215063799. The next prime is 1215063821. The reversal of 1215063818 is 8183605121.

It is a super-3 number, since 3×1215063818³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 123530 + ... + 133002.

It is an arithmetic number, because the mean of its divisors is an integer number (115961760).

Almost surely, 2^1215063818 is an apocalyptic number.

1215063818 is a deficient number, since it is larger than the sum of its proper divisors (640324342).

1215063818 is a wasteful number, since it uses less digits than its factorization.

1215063818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1215063818 is about 34857.7655336655. The cubic root of 1215063818 is about 1067.0866736386.

Adding to 1215063818 its reverse (8183605121), we get a palindrome (9398668939).

The spelling of 1215063818 in words is "one billion, two hundred fifteen million, sixty-three thousand, eight hundred eighteen".