23142881 has 2 divisors, whose sum is σ = 23142882. Its totient is φ = 23142880.

The previous prime is 23142869. The next prime is 23142883. The reversal of 23142881 is 18824132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 2531281 = 4540^2 + 1591^2 .

It is a cyclic number.

It is not a de Polignac number, because 23142881 - 2¹⁰ = 23141857 is a prime.

It is a super-2 number, since 2×23142881² = 1071185881960322, which contains 22 as substring.

Together with 23142883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23142883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11571440 + 11571441.

It is an arithmetic number, because the mean of its divisors is an integer number (11571441).

Almost surely, 2^23142881 is an apocalyptic number.

It is an amenable number.

23142881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23142881 is an equidigital number, since it uses as much as digits as its factorization.

23142881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The square root of 23142881 is about 4810.7048340134. The cubic root of 23142881 is about 284.9743734011.

The spelling of 23142881 in words is "twenty-three million, one hundred forty-two thousand, eight hundred eighty-one".