23121583 has 2 divisors, whose sum is σ = 23121584. Its totient is φ = 23121582.

The previous prime is 23121557. The next prime is 23121607. The reversal of 23121583 is 38512132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23121583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560791 + 11560792.

It is an arithmetic number, because the mean of its divisors is an integer number (11560792).

Almost surely, 2^23121583 is an apocalyptic number.

23121583 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121583 is an equidigital number, since it uses as much as digits as its factorization.

23121583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 23121583 is about 4808.4907195502. The cubic root of 23121583 is about 284.8869275467.

The spelling of 23121583 in words is "twenty-three million, one hundred twenty-one thousand, five hundred eighty-three".