2211565457 has 2 divisors, whose sum is σ = 2211565458. Its totient is φ = 2211565456.

The previous prime is 2211565409. The next prime is 2211565459. The reversal of 2211565457 is 7545651122.

2211565457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1935208081 + 276357376 = 43991^2 + 16624^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211565457 - 2¹⁸ = 2211303313 is a prime.

Together with 2211565459, 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 2211565457.

It is not a weakly prime, because it can be changed into another prime (2211565459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105782728 + 1105782729.

It is an arithmetic number, because the mean of its divisors is an integer number (1105782729).

Almost surely, 2^2211565457 is an apocalyptic number.

It is an amenable number.

2211565457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211565457 is an equidigital number, since it uses as much as digits as its factorization.

2211565457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 2211565457 is about 47027.2841763162. The cubic root of 2211565457 is about 1302.8665457231.

The spelling of 2211565457 in words is "two billion, two hundred eleven million, five hundred sixty-five thousand, four hundred fifty-seven".