23204557 has 2 divisors, whose sum is σ = 23204558. Its totient is φ = 23204556.

The previous prime is 23204527. The next prime is 23204593. The reversal of 23204557 is 75540232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21261321 + 1943236 = 4611^2 + 1394^2 .

It is a cyclic number.

It is not a de Polignac number, because 23204557 - 2⁷ = 23204429 is a prime.

It is equal to p_1460296 and since 23204557 and 1460296 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23204527) 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, 11602278 + 11602279.

It is an arithmetic number, because the mean of its divisors is an integer number (11602279).

Almost surely, 2^23204557 is an apocalyptic number.

It is an amenable number.

23204557 is a deficient number, since it is larger than the sum of its proper divisors (1).

23204557 is an equidigital number, since it uses as much as digits as its factorization.

23204557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 23204557 is about 4817.1108561045. The cubic root of 23204557 is about 285.2273019951.

Adding to 23204557 its reverse (75540232), we get a palindrome (98744789).

The spelling of 23204557 in words is "twenty-three million, two hundred four thousand, five hundred fifty-seven".