22762721 has 2 divisors, whose sum is σ = 22762722. Its totient is φ = 22762720.

The previous prime is 22762717. The next prime is 22762723. The reversal of 22762721 is 12726722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20802721 + 1960000 = 4561^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 22762721 - 2² = 22762717 is a prime.

Together with 22762723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22762723) 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, 11381360 + 11381361.

It is an arithmetic number, because the mean of its divisors is an integer number (11381361).

Almost surely, 2^22762721 is an apocalyptic number.

It is an amenable number.

22762721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22762721 is an equidigital number, since it uses as much as digits as its factorization.

22762721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 22762721 is about 4771.0293438628. The cubic root of 22762721 is about 283.4053591591.

The spelling of 22762721 in words is "twenty-two million, seven hundred sixty-two thousand, seven hundred twenty-one".