226252561 has 2 divisors, whose sum is σ = 226252562. Its totient is φ = 226252560.

The previous prime is 226252517. The next prime is 226252567. The reversal of 226252561 is 165252622.

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., 219780625 + 6471936 = 14825^2 + 2544^2 .

It is a cyclic number.

It is not a de Polignac number, because 226252561 - 2¹⁵ = 226219793 is a prime.

It is equal to p_12447904 and since 226252561 and 12447904 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (226252567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113126280 + 113126281.

It is an arithmetic number, because the mean of its divisors is an integer number (113126281).

Almost surely, 2^226252561 is an apocalyptic number.

It is an amenable number.

226252561 is a deficient number, since it is larger than the sum of its proper divisors (1).

226252561 is an equidigital number, since it uses as much as digits as its factorization.

226252561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 226252561 is about 15041.6940867709. The cubic root of 226252561 is about 609.3467529874.

The spelling of 226252561 in words is "two hundred twenty-six million, two hundred fifty-two thousand, five hundred sixty-one".