23172281 has 8 divisors (see below), whose sum is σ = 25392000. Its totient is φ = 20971440.

The previous prime is 23172251. The next prime is 23172287. The reversal of 23172281 is 18227132.

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 23172281 - 2¹⁴ = 23155897 is a prime.

It is a super-2 number, since 2×23172281² = 1073909213485922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23172281.

It is not an unprimeable number, because it can be changed into a prime (23172287) 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, 2081 + ... + 7118.

It is an arithmetic number, because the mean of its divisors is an integer number (3174000).

Almost surely, 2^23172281 is an apocalyptic number.

It is an amenable number.

23172281 is a deficient number, since it is larger than the sum of its proper divisors (2219719).

23172281 is a wasteful number, since it uses less digits than its factorization.

23172281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9439.

The product of its digits is 1344, while the sum is 26.

The square root of 23172281 is about 4813.7595494582. The cubic root of 23172281 is about 285.0949965459.

The spelling of 23172281 in words is "twenty-three million, one hundred seventy-two thousand, two hundred eighty-one".