1215502055 has 16 divisors (see below), whose sum is σ = 1477634400. Its totient is φ = 959783040.

The previous prime is 1215502021. The next prime is 1215502087. The reversal of 1215502055 is 5502055121.

It is not a de Polignac number, because 1215502055 - 2¹⁸ = 1215239911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142460 + ... + 150750.

It is an arithmetic number, because the mean of its divisors is an integer number (92352150).

Almost surely, 2^1215502055 is an apocalyptic number.

1215502055 is a deficient number, since it is larger than the sum of its proper divisors (262132345).

1215502055 is a wasteful number, since it uses less digits than its factorization.

1215502055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8674.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1215502055 is about 34864.0510411513. The cubic root of 1215502055 is about 1067.2149469156.

Adding to 1215502055 its reverse (5502055121), we get a palindrome (6717557176).

The spelling of 1215502055 in words is "one billion, two hundred fifteen million, five hundred two thousand, fifty-five".