23283281 has 6 divisors (see below), whose sum is σ = 27084690. Its totient is φ = 19957056.

The previous prime is 23283241. The next prime is 23283289. The reversal of 23283281 is 18238232.

It can be written as a sum of positive squares in only one way, i.e., 22657600 + 625681 = 4760^2 + 791^2 .

It is not a de Polignac number, because 23283281 - 2¹⁰ = 23282257 is a prime.

It is a super-2 number, since 2×23283281² = 1084222348249922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23283289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237536 + ... + 237633.

It is an arithmetic number, because the mean of its divisors is an integer number (4514115).

Almost surely, 2^23283281 is an apocalyptic number.

It is an amenable number.

23283281 is a deficient number, since it is larger than the sum of its proper divisors (3801409).

23283281 is an equidigital number, since it uses as much as digits as its factorization.

23283281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475183 (or 475176 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 23283281 is about 4825.2752253110. The cubic root of 23283281 is about 285.5494928627.

The spelling of 23283281 in words is "twenty-three million, two hundred eighty-three thousand, two hundred eighty-one".