1155140227 has 2 divisors, whose sum is σ = 1155140228. Its totient is φ = 1155140226.

The previous prime is 1155140177. The next prime is 1155140237. The reversal of 1155140227 is 7220415511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155140227 is a prime.

It is a super-2 number, since 2×1155140227² = 2668697888067223058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1155140195 and 1155140204.

It is not a weakly prime, because it can be changed into another prime (1155140237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577570113 + 577570114.

It is an arithmetic number, because the mean of its divisors is an integer number (577570114).

Almost surely, 2^1155140227 is an apocalyptic number.

1155140227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155140227 is an equidigital number, since it uses as much as digits as its factorization.

1155140227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1155140227 is about 33987.3539276008. The cubic root of 1155140227 is about 1049.2482077313.

Adding to 1155140227 its reverse (7220415511), we get a palindrome (8375555738).

The spelling of 1155140227 in words is "one billion, one hundred fifty-five million, one hundred forty thousand, two hundred twenty-seven".