23224561 has 2 divisors, whose sum is σ = 23224562. Its totient is φ = 23224560.

The previous prime is 23224541. The next prime is 23224577. The reversal of 23224561 is 16542232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15210000 + 8014561 = 3900^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 23224561 - 2⁵ = 23224529 is a prime.

It is not a weakly prime, because it can be changed into another prime (23224541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11612280 + 11612281.

It is an arithmetic number, because the mean of its divisors is an integer number (11612281).

Almost surely, 2^23224561 is an apocalyptic number.

It is an amenable number.

23224561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23224561 is an equidigital number, since it uses as much as digits as its factorization.

23224561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 23224561 is about 4819.1867571199. The cubic root of 23224561 is about 285.3092406155.

Adding to 23224561 its reverse (16542232), we get a palindrome (39766793).

The spelling of 23224561 in words is "twenty-three million, two hundred twenty-four thousand, five hundred sixty-one".