22400057 has 2 divisors, whose sum is σ = 22400058. Its totient is φ = 22400056.

The previous prime is 22400051. The next prime is 22400071. The reversal of 22400057 is 75000422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12313081 + 10086976 = 3509^2 + 3176^2 .

It is a cyclic number.

It is not a de Polignac number, because 22400057 - 2⁴ = 22400041 is a prime.

It is not a weakly prime, because it can be changed into another prime (22400051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11200028 + 11200029.

It is an arithmetic number, because the mean of its divisors is an integer number (11200029).

Almost surely, 2^22400057 is an apocalyptic number.

It is an amenable number.

22400057 is a deficient number, since it is larger than the sum of its proper divisors (1).

22400057 is an equidigital number, since it uses as much as digits as its factorization.

22400057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 22400057 is about 4732.8698481999. The cubic root of 22400057 is about 281.8921883872.

Adding to 22400057 its reverse (75000422), we get a palindrome (97400479).

The spelling of 22400057 in words is "twenty-two million, four hundred thousand, fifty-seven".