1215882215 has 4 divisors (see below), whose sum is σ = 1459058664. Its totient is φ = 972705768.

The previous prime is 1215882149. The next prime is 1215882221. The reversal of 1215882215 is 5122885121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215882215 - 2¹² = 1215878119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 121588217 + ... + 121588226.

It is an arithmetic number, because the mean of its divisors is an integer number (364764666).

Almost surely, 2^1215882215 is an apocalyptic number.

1215882215 is a deficient number, since it is larger than the sum of its proper divisors (243176449).

1215882215 is an equidigital number, since it uses as much as digits as its factorization.

1215882215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243176448.

The product of its digits is 12800, while the sum is 35.

The square root of 1215882215 is about 34869.5026491632. The cubic root of 1215882215 is about 1067.3261959102.

The spelling of 1215882215 in words is "one billion, two hundred fifteen million, eight hundred eighty-two thousand, two hundred fifteen".