1215166615 has 12 divisors (see below), whose sum is σ = 1578998664. Its totient is φ = 897353184.

The previous prime is 1215166577. The next prime is 1215166619. The reversal of 1215166615 is 5166615121.

It is not a de Polignac number, because 1215166615 - 2¹³ = 1215158423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215166619) 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, 718189 + ... + 719878.

It is an arithmetic number, because the mean of its divisors is an integer number (131583222).

Almost surely, 2^1215166615 is an apocalyptic number.

1215166615 is a deficient number, since it is larger than the sum of its proper divisors (363832049).

1215166615 is a wasteful number, since it uses less digits than its factorization.

1215166615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438098 (or 1438085 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The square root of 1215166615 is about 34859.2400232707. The cubic root of 1215166615 is about 1067.1167653956.

The spelling of 1215166615 in words is "one billion, two hundred fifteen million, one hundred sixty-six thousand, six hundred fifteen".