22293281 has 4 divisors (see below), whose sum is σ = 22351872. Its totient is φ = 22234692.

The previous prime is 22293269. The next prime is 22293287. The reversal of 22293281 is 18239222.

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 22293281 - 2¹⁸ = 22031137 is a prime.

It is a super-2 number, since 2×22293281² = 993980755489922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22293287) 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, 28721 + ... + 29486.

It is an arithmetic number, because the mean of its divisors is an integer number (5587968).

Almost surely, 2^22293281 is an apocalyptic number.

It is an amenable number.

22293281 is a deficient number, since it is larger than the sum of its proper divisors (58591).

22293281 is an equidigital number, since it uses as much as digits as its factorization.

22293281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58590.

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

The square root of 22293281 is about 4721.5761139687. The cubic root of 22293281 is about 281.4435693961.

The spelling of 22293281 in words is "twenty-two million, two hundred ninety-three thousand, two hundred eighty-one".