1215015275 has 6 divisors (see below), whose sum is σ = 1506618972. Its totient is φ = 972012200.

The previous prime is 1215015229. The next prime is 1215015289. The reversal of 1215015275 is 5725105121.

It is not a de Polignac number, because 1215015275 - 2²⁶ = 1147906411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24300281 + ... + 24300330.

It is an arithmetic number, because the mean of its divisors is an integer number (251103162).

Almost surely, 2^1215015275 is an apocalyptic number.

1215015275 is a deficient number, since it is larger than the sum of its proper divisors (291603697).

1215015275 is an equidigital number, since it uses as much as digits as its factorization.

1215015275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48600621 (or 48600616 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 29.

The square root of 1215015275 is about 34857.0692256248. The cubic root of 1215015275 is about 1067.0724630604.

The spelling of 1215015275 in words is "one billion, two hundred fifteen million, fifteen thousand, two hundred seventy-five".