11215575217 has 16 divisors (see below), whose sum is σ = 14465232000. Its totient is φ = 8438048640.

The previous prime is 11215575209. The next prime is 11215575221. The reversal of 11215575217 is 71257551211.

It is not a de Polignac number, because 11215575217 - 2³ = 11215575209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11215575247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2509092 + ... + 2513557.

It is an arithmetic number, because the mean of its divisors is an integer number (904077000).

Almost surely, 2^11215575217 is an apocalyptic number.

It is an amenable number.

11215575217 is a deficient number, since it is larger than the sum of its proper divisors (3249656783).

11215575217 is a wasteful number, since it uses less digits than its factorization.

11215575217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5022696.

The product of its digits is 24500, while the sum is 37.

The spelling of 11215575217 in words is "eleven billion, two hundred fifteen million, five hundred seventy-five thousand, two hundred seventeen".