1156561223 has 2 divisors, whose sum is σ = 1156561224. Its totient is φ = 1156561222.

The previous prime is 1156561171. The next prime is 1156561277. The reversal of 1156561223 is 3221656511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1156561223 - 2¹⁶ = 1156495687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156561223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1156561723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578280611 + 578280612.

It is an arithmetic number, because the mean of its divisors is an integer number (578280612).

Almost surely, 2^1156561223 is an apocalyptic number.

1156561223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156561223 is an equidigital number, since it uses as much as digits as its factorization.

1156561223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 1156561223 is about 34008.2522779398. The cubic root of 1156561223 is about 1049.6782757333.

The spelling of 1156561223 in words is "one billion, one hundred fifty-six million, five hundred sixty-one thousand, two hundred twenty-three".