22279393 has 4 divisors (see below), whose sum is σ = 22312980. Its totient is φ = 22245808.

The previous prime is 22279373. The next prime is 22279409. The reversal of 22279393 is 39397222.

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 21095649 + 1183744 = 4593^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 22279393 - 2¹³ = 22271201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22279373) 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, 15778 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (5578245).

Almost surely, 2^22279393 is an apocalyptic number.

It is an amenable number.

22279393 is a deficient number, since it is larger than the sum of its proper divisors (33587).

22279393 is an equidigital number, since it uses as much as digits as its factorization.

22279393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33586.

The product of its digits is 40824, while the sum is 37.

The square root of 22279393 is about 4720.1051895058. The cubic root of 22279393 is about 281.3851138128.

The spelling of 22279393 in words is "twenty-two million, two hundred seventy-nine thousand, three hundred ninety-three".