226520521 has 2 divisors, whose sum is σ = 226520522. Its totient is φ = 226520520.

The previous prime is 226520513. The next prime is 226520543. The reversal of 226520521 is 125025622.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172659600 + 53860921 = 13140^2 + 7339^2 .

It is a cyclic number.

It is not a de Polignac number, because 226520521 - 2³ = 226520513 is a prime.

It is a super-2 number, since 2×226520521² = 102623092868222882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (226521521) 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, 113260260 + 113260261.

It is an arithmetic number, because the mean of its divisors is an integer number (113260261).

Almost surely, 2^226520521 is an apocalyptic number.

It is an amenable number.

226520521 is a deficient number, since it is larger than the sum of its proper divisors (1).

226520521 is an equidigital number, since it uses as much as digits as its factorization.

226520521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 226520521 is about 15050.5986924109. The cubic root of 226520521 is about 609.5872160311.

The spelling of 226520521 in words is "two hundred twenty-six million, five hundred twenty thousand, five hundred twenty-one".