23440331 has 4 divisors (see below), whose sum is σ = 24819192. Its totient is φ = 22061472.

The previous prime is 23440321. The next prime is 23440343. The reversal of 23440331 is 13304432.

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

It is a cyclic number.

It is not a de Polignac number, because 23440331 - 2⁶ = 23440267 is a prime.

It is a super-2 number, since 2×23440331² = 1098898234779122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23440321) 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, 689405 + ... + 689438.

It is an arithmetic number, because the mean of its divisors is an integer number (6204798).

Almost surely, 2^23440331 is an apocalyptic number.

23440331 is a deficient number, since it is larger than the sum of its proper divisors (1378861).

23440331 is a wasteful number, since it uses less digits than its factorization.

23440331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378860.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 23440331 is about 4841.5215583533. The cubic root of 23440331 is about 286.1900826136.

Adding to 23440331 its reverse (13304432), we get a palindrome (36744763).

The spelling of 23440331 in words is "twenty-three million, four hundred forty thousand, three hundred thirty-one".