2216523457 has 2 divisors, whose sum is σ = 2216523458. Its totient is φ = 2216523456.

The previous prime is 2216523433. The next prime is 2216523469. The reversal of 2216523457 is 7543256122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1774010161 + 442513296 = 42119^2 + 21036^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216523457 - 2¹¹ = 2216521409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2216523857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108261728 + 1108261729.

It is an arithmetic number, because the mean of its divisors is an integer number (1108261729).

Almost surely, 2^2216523457 is an apocalyptic number.

It is an amenable number.

2216523457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2216523457 is an equidigital number, since it uses as much as digits as its factorization.

2216523457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 37.

The square root of 2216523457 is about 47079.9687446795. The cubic root of 2216523457 is about 1303.8394299085.

Adding to 2216523457 its reverse (7543256122), we get a palindrome (9759779579).

The spelling of 2216523457 in words is "two billion, two hundred sixteen million, five hundred twenty-three thousand, four hundred fifty-seven".