22811797 has 2 divisors, whose sum is σ = 22811798. Its totient is φ = 22811796.

The previous prime is 22811749. The next prime is 22811809. The reversal of 22811797 is 79711822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16329681 + 6482116 = 4041^2 + 2546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22811797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22811597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11405898 + 11405899.

It is an arithmetic number, because the mean of its divisors is an integer number (11405899).

Almost surely, 2^22811797 is an apocalyptic number.

It is an amenable number.

22811797 is a deficient number, since it is larger than the sum of its proper divisors (1).

22811797 is an equidigital number, since it uses as much as digits as its factorization.

22811797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 37.

The square root of 22811797 is about 4776.1696996652. The cubic root of 22811797 is about 283.6088851778.

The spelling of 22811797 in words is "twenty-two million, eight hundred eleven thousand, seven hundred ninety-seven".