1215008905 has 16 divisors (see below), whose sum is σ = 1606961664. Its totient is φ = 874529280.

The previous prime is 1215008881. The next prime is 1215008933. The reversal of 1215008905 is 5098005121.

It is not a de Polignac number, because 1215008905 - 2⁷ = 1215008777 is a prime.

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, 108537 + ... + 119206.

It is an arithmetic number, because the mean of its divisors is an integer number (100435104).

Almost surely, 2^1215008905 is an apocalyptic number.

It is an amenable number.

1215008905 is a deficient number, since it is larger than the sum of its proper divisors (391952759).

1215008905 is a wasteful number, since it uses less digits than its factorization.

1215008905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227856.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 1215008905 is about 34856.9778523612. The cubic root of 1215008905 is about 1067.0705982653.

The spelling of 1215008905 in words is "one billion, two hundred fifteen million, eight thousand, nine hundred five".