2105722057 has 2 divisors, whose sum is σ = 2105722058. Its totient is φ = 2105722056.

The previous prime is 2105721991. The next prime is 2105722067. The reversal of 2105722057 is 7502275012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1969673161 + 136048896 = 44381^2 + 11664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105722057 is a prime.

It is a super-2 number, since 2×2105722057² = 8868130762672622498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2105722067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052861028 + 1052861029.

It is an arithmetic number, because the mean of its divisors is an integer number (1052861029).

Almost surely, 2^2105722057 is an apocalyptic number.

It is an amenable number.

2105722057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105722057 is an equidigital number, since it uses as much as digits as its factorization.

2105722057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 2105722057 is about 45888.1472386933. The cubic root of 2105722057 is about 1281.7412128750.

Adding to 2105722057 its reverse (7502275012), we get a palindrome (9607997069).

The spelling of 2105722057 in words is "two billion, one hundred five million, seven hundred twenty-two thousand, fifty-seven".