23281381 has 8 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 21705408.

The previous prime is 23281367. The next prime is 23281387. The reversal of 23281381 is 18318232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23281381 is a prime.

It is a super-2 number, since 2×23281381² = 1084045402534322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23281387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (3110400).

Almost surely, 2^23281381 is an apocalyptic number.

It is an amenable number.

23281381 is a deficient number, since it is larger than the sum of its proper divisors (1601819).

23281381 is a wasteful number, since it uses less digits than its factorization.

23281381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12923.

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

The square root of 23281381 is about 4825.0783413329. The cubic root of 23281381 is about 285.5417253607.

The spelling of 23281381 in words is "twenty-three million, two hundred eighty-one thousand, three hundred eighty-one".