22373281 has 4 divisors (see below), whose sum is σ = 25569472. Its totient is φ = 19177092.

The previous prime is 22373257. The next prime is 22373291. The reversal of 22373281 is 18237322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22373281 - 2⁹ = 22372769 is a prime.

It is a super-2 number, since 2×22373281² = 1001127405409922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22373251) 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, 1598085 + ... + 1598098.

It is an arithmetic number, because the mean of its divisors is an integer number (6392368).

Almost surely, 2^22373281 is an apocalyptic number.

It is an amenable number.

22373281 is a deficient number, since it is larger than the sum of its proper divisors (3196191).

22373281 is an equidigital number, since it uses as much as digits as its factorization.

22373281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196190.

The product of its digits is 4032, while the sum is 28.

The square root of 22373281 is about 4730.0402746700. The cubic root of 22373281 is about 281.7798232754.

The spelling of 22373281 in words is "twenty-two million, three hundred seventy-three thousand, two hundred eighty-one".