23335561 has 2 divisors, whose sum is σ = 23335562. Its totient is φ = 23335560.

The previous prime is 23335549. The next prime is 23335583. The reversal of 23335561 is 16553332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16281225 + 7054336 = 4035^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 23335561 - 2¹⁹ = 22811273 is a prime.

It is not a weakly prime, because it can be changed into another prime (23335261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11667780 + 11667781.

It is an arithmetic number, because the mean of its divisors is an integer number (11667781).

Almost surely, 2^23335561 is an apocalyptic number.

It is an amenable number.

23335561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23335561 is an equidigital number, since it uses as much as digits as its factorization.

23335561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 28.

The square root of 23335561 is about 4830.6894952998. The cubic root of 23335561 is about 285.7630562341.

Adding to 23335561 its reverse (16553332), we get a palindrome (39888893).

The spelling of 23335561 in words is "twenty-three million, three hundred thirty-five thousand, five hundred sixty-one".