23813281 has 8 divisors (see below), whose sum is σ = 24323040. Its totient is φ = 23308992.

The previous prime is 23813267. The next prime is 23813287. The reversal of 23813281 is 18231832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23813281 - 2¹⁵ = 23780513 is a prime.

It is a super-2 number, since 2×23813281² = 1134144703969922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23813287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8110 + ... + 10648.

It is an arithmetic number, because the mean of its divisors is an integer number (3040380).

Almost surely, 2^23813281 is an apocalyptic number.

It is an amenable number.

23813281 is a deficient number, since it is larger than the sum of its proper divisors (509759).

23813281 is a wasteful number, since it uses less digits than its factorization.

23813281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its digits is 2304, while the sum is 28.

The square root of 23813281 is about 4879.8853470138. The cubic root of 23813281 is about 287.6999229483.

The spelling of 23813281 in words is "twenty-three million, eight hundred thirteen thousand, two hundred eighty-one".