5226645581 has 2 divisors, whose sum is σ = 5226645582. Its totient is φ = 5226645580.

The previous prime is 5226645577. The next prime is 5226645583. The reversal of 5226645581 is 1855466225.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2780452900 + 2446192681 = 52730^2 + 49459^2 .

It is a cyclic number.

It is not a de Polignac number, because 5226645581 - 2² = 5226645577 is a prime.

It is a super-2 number, since 2×5226645581² = 54635648058773655122, which contains 22 as substring.

Together with 5226645583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5226645583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2613322790 + 2613322791.

It is an arithmetic number, because the mean of its divisors is an integer number (2613322791).

Almost surely, 2^5226645581 is an apocalyptic number.

It is an amenable number.

5226645581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5226645581 is an equidigital number, since it uses as much as digits as its factorization.

5226645581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 44.

The square root of 5226645581 is about 72295.5432997083. The cubic root of 5226645581 is about 1735.4323301476.

The spelling of 5226645581 in words is "five billion, two hundred twenty-six million, six hundred forty-five thousand, five hundred eighty-one".