22521244481 has 2 divisors, whose sum is σ = 22521244482. Its totient is φ = 22521244480.

The previous prime is 22521244463. The next prime is 22521244511. The reversal of 22521244481 is 18444212522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18506881600 + 4014362881 = 136040^2 + 63359^2 .

It is a cyclic number.

It is not a de Polignac number, because 22521244481 - 2³⁴ = 5341375297 is a prime.

It is a super-2 number, since 2×22521244481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22521244441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260622240 + 11260622241.

It is an arithmetic number, because the mean of its divisors is an integer number (11260622241).

Almost surely, 2^22521244481 is an apocalyptic number.

It is an amenable number.

22521244481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22521244481 is an equidigital number, since it uses as much as digits as its factorization.

22521244481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40960, while the sum is 35.

The spelling of 22521244481 in words is "twenty-two billion, five hundred twenty-one million, two hundred forty-four thousand, four hundred eighty-one".