23056381 has 4 divisors (see below), whose sum is σ = 23284764. Its totient is φ = 22828000.

The previous prime is 23056379. The next prime is 23056417. The reversal of 23056381 is 18365032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15405625 + 7650756 = 3925^2 + 2766^2 .

It is a cyclic number.

It is not a de Polignac number, because 23056381 - 2¹ = 23056379 is a prime.

It is a super-2 number, since 2×23056381² = 1063193409634322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23056351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114040 + ... + 114241.

It is an arithmetic number, because the mean of its divisors is an integer number (5821191).

Almost surely, 2^23056381 is an apocalyptic number.

It is an amenable number.

23056381 is a deficient number, since it is larger than the sum of its proper divisors (228383).

23056381 is a wasteful number, since it uses less digits than its factorization.

23056381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228382.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 23056381 is about 4801.7060509781. The cubic root of 23056381 is about 284.6188852691.

It can be divided in two parts, 23056 and 381, that multiplied together give a triangular number (8784336 = T₄₁₉₁).

The spelling of 23056381 in words is "twenty-three million, fifty-six thousand, three hundred eighty-one".