2255431561 has 2 divisors, whose sum is σ = 2255431562. Its totient is φ = 2255431560.

The previous prime is 2255431559. The next prime is 2255431631. The reversal of 2255431561 is 1651345522.

2255431561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1597201225 + 658230336 = 39965^2 + 25656^2 .

It is a cyclic number.

It is not a de Polignac number, because 2255431561 - 2¹ = 2255431559 is a prime.

Together with 2255431559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2255432561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127715780 + 1127715781.

It is an arithmetic number, because the mean of its divisors is an integer number (1127715781).

Almost surely, 2^2255431561 is an apocalyptic number.

It is an amenable number.

2255431561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2255431561 is an equidigital number, since it uses as much as digits as its factorization.

2255431561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 34.

The square root of 2255431561 is about 47491.3840712186. The cubic root of 2255431561 is about 1311.4242732344.

The spelling of 2255431561 in words is "two billion, two hundred fifty-five million, four hundred thirty-one thousand, five hundred sixty-one".