2562222661 has 2 divisors, whose sum is σ = 2562222662. Its totient is φ = 2562222660.

The previous prime is 2562222569. The next prime is 2562222673. The reversal of 2562222661 is 1662222652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2249604900 + 312617761 = 47430^2 + 17681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2562222661 - 2²⁵ = 2528668229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2562222461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281111330 + 1281111331.

It is an arithmetic number, because the mean of its divisors is an integer number (1281111331).

Almost surely, 2^2562222661 is an apocalyptic number.

It is an amenable number.

2562222661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2562222661 is an equidigital number, since it uses as much as digits as its factorization.

2562222661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 2562222661 is about 50618.4023947813. The cubic root of 2562222661 is about 1368.3765487395.

Subtracting from 2562222661 its reverse (1662222652), we obtain a palindrome (900000009).

The spelling of 2562222661 in words is "two billion, five hundred sixty-two million, two hundred twenty-two thousand, six hundred sixty-one".