23130881 has 2 divisors, whose sum is σ = 23130882. Its totient is φ = 23130880.

The previous prime is 23130871. The next prime is 23130889. The reversal of 23130881 is 18803132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20295025 + 2835856 = 4505^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 23130881 - 2⁶ = 23130817 is a prime.

It is a super-2 number, since 2×23130881² = 1070075311672322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23130881.

It is not a weakly prime, because it can be changed into another prime (23130889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565440 + 11565441.

It is an arithmetic number, because the mean of its divisors is an integer number (11565441).

Almost surely, 2^23130881 is an apocalyptic number.

It is an amenable number.

23130881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23130881 is an equidigital number, since it uses as much as digits as its factorization.

23130881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 23130881 is about 4809.4574538091. The cubic root of 23130881 is about 284.9251101063.

The spelling of 23130881 in words is "twenty-three million, one hundred thirty thousand, eight hundred eighty-one".