23442557 has 2 divisors, whose sum is σ = 23442558. Its totient is φ = 23442556.

The previous prime is 23442553. The next prime is 23442569. The reversal of 23442557 is 75524432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22174681 + 1267876 = 4709^2 + 1126^2 .

It is a cyclic number.

It is not a de Polignac number, because 23442557 - 2² = 23442553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23442553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11721278 + 11721279.

It is an arithmetic number, because the mean of its divisors is an integer number (11721279).

Almost surely, 2^23442557 is an apocalyptic number.

It is an amenable number.

23442557 is a deficient number, since it is larger than the sum of its proper divisors (1).

23442557 is an equidigital number, since it uses as much as digits as its factorization.

23442557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 32.

The square root of 23442557 is about 4841.7514393038. The cubic root of 23442557 is about 286.1991416290.

Adding to 23442557 its reverse (75524432), we get a palindrome (98966989).

The spelling of 23442557 in words is "twenty-three million, four hundred forty-two thousand, five hundred fifty-seven".