23922281 has 4 divisors (see below), whose sum is σ = 25329492. Its totient is φ = 22515072.

The previous prime is 23922257. The next prime is 23922287. The reversal of 23922281 is 18222932.

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 18705625 + 5216656 = 4325^2 + 2284^2 .

It is not a de Polignac number, because 23922281 - 2¹⁰ = 23921257 is a prime.

It is a super-2 number, since 2×23922281² = 1144551056485922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23922287) 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, 703580 + ... + 703613.

It is an arithmetic number, because the mean of its divisors is an integer number (6332373).

Almost surely, 2^23922281 is an apocalyptic number.

It is an amenable number.

23922281 is a deficient number, since it is larger than the sum of its proper divisors (1407211).

23922281 is a wasteful number, since it uses less digits than its factorization.

23922281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407210.

The product of its digits is 3456, while the sum is 29.

The square root of 23922281 is about 4891.0408912623. The cubic root of 23922281 is about 288.1382157113.

The spelling of 23922281 in words is "twenty-three million, nine hundred twenty-two thousand, two hundred eighty-one".