23381491 has 8 divisors (see below), whose sum is σ = 26783840. Its totient is φ = 19994688.

The previous prime is 23381473. The next prime is 23381497. The reversal of 23381491 is 19418332.

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

It is not a de Polignac number, because 23381491 - 2⁹ = 23380979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23381497) 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, 456 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (3347980).

Almost surely, 2^23381491 is an apocalyptic number.

23381491 is a deficient number, since it is larger than the sum of its proper divisors (3402349).

23381491 is an equidigital number, since it uses as much as digits as its factorization.

23381491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773.

The product of its digits is 5184, while the sum is 31.

The square root of 23381491 is about 4835.4411380969. The cubic root of 23381491 is about 285.9504168531.

The spelling of 23381491 in words is "twenty-three million, three hundred eighty-one thousand, four hundred ninety-one".