9227117561 has 4 divisors (see below), whose sum is σ = 9227389824. Its totient is φ = 9226845300.

The previous prime is 9227117539. The next prime is 9227117593. The reversal of 9227117561 is 1657117229.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1657117229 = 26879 ⋅61651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9227117561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9227117261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76625 + ... + 155966.

It is an arithmetic number, because the mean of its divisors is an integer number (2306847456).

Almost surely, 2^9227117561 is an apocalyptic number.

It is an amenable number.

9227117561 is a deficient number, since it is larger than the sum of its proper divisors (272263).

9227117561 is a wasteful number, since it uses less digits than its factorization.

9227117561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272262.

The product of its digits is 52920, while the sum is 41.

The square root of 9227117561 is about 96057.8865112074. The cubic root of 9227117561 is about 2097.4358394457.

The spelling of 9227117561 in words is "nine billion, two hundred twenty-seven million, one hundred seventeen thousand, five hundred sixty-one".