2261511227 has 2 divisors, whose sum is σ = 2261511228. Its totient is φ = 2261511226.

The previous prime is 2261511221. The next prime is 2261511229. The reversal of 2261511227 is 7221151622.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2261511227 - 2⁴ = 2261511211 is a prime.

It is a super-2 number, since 2×2261511227² = 10228866059694091058, which contains 22 as substring.

Together with 2261511229, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2261511227.

It is not a weakly prime, because it can be changed into another prime (2261511221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130755613 + 1130755614.

It is an arithmetic number, because the mean of its divisors is an integer number (1130755614).

Almost surely, 2^2261511227 is an apocalyptic number.

2261511227 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261511227 is an equidigital number, since it uses as much as digits as its factorization.

2261511227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 2261511227 is about 47555.3490892455. The cubic root of 2261511227 is about 1312.6015598751.

Adding to 2261511227 its reverse (7221151622), we get a palindrome (9482662849).

The spelling of 2261511227 in words is "two billion, two hundred sixty-one million, five hundred eleven thousand, two hundred twenty-seven".