2256312201161 has 2 divisors, whose sum is σ = 2256312201162. Its totient is φ = 2256312201160.

The previous prime is 2256312201097. The next prime is 2256312201167. The reversal of 2256312201161 is 1611022136522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1709517025225 + 546795175936 = 1307485^2 + 739456^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256312201161 - 2⁶ = 2256312201097 is a prime.

It is not a weakly prime, because it can be changed into another prime (2256312201167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128156100580 + 1128156100581.

It is an arithmetic number, because the mean of its divisors is an integer number (1128156100581).

Almost surely, 2^{2256312201161} is an apocalyptic number.

It is an amenable number.

2256312201161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256312201161 is an equidigital number, since it uses as much as digits as its factorization.

2256312201161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 2256312201161 its reverse (1611022136522), we get a palindrome (3867334337683).

The spelling of 2256312201161 in words is "two trillion, two hundred fifty-six billion, three hundred twelve million, two hundred one thousand, one hundred sixty-one".