23238281 has 4 divisors (see below), whose sum is σ = 25350864. Its totient is φ = 21125700.

The previous prime is 23238263. The next prime is 23238283. The reversal of 23238281 is 18283232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23238281 - 2¹⁰ = 23237257 is a prime.

It is a super-2 number, since 2×23238281² = 1080035407669922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23238283) 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 3 ways as a sum of consecutive naturals, for example, 1056275 + ... + 1056296.

It is an arithmetic number, because the mean of its divisors is an integer number (6337716).

Almost surely, 2^23238281 is an apocalyptic number.

It is an amenable number.

23238281 is a deficient number, since it is larger than the sum of its proper divisors (2112583).

23238281 is a wasteful number, since it uses less digits than its factorization.

23238281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112582.

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

The square root of 23238281 is about 4820.6100236381. The cubic root of 23238281 is about 285.3654120714.

The spelling of 23238281 in words is "twenty-three million, two hundred thirty-eight thousand, two hundred eighty-one".