22277213 has 6 divisors (see below), whose sum is σ = 25914366. Its totient is φ = 19094712.

The previous prime is 22277209. The next prime is 22277221. The reversal of 22277213 is 31277222.

It can be written as a sum of positive squares in only one way, i.e., 22259524 + 17689 = 4718^2 + 133^2 .

It is not a de Polignac number, because 22277213 - 2² = 22277209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22277243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227270 + ... + 227367.

It is an arithmetic number, because the mean of its divisors is an integer number (4319061).

Almost surely, 2^22277213 is an apocalyptic number.

It is an amenable number.

22277213 is a deficient number, since it is larger than the sum of its proper divisors (3637153).

22277213 is an equidigital number, since it uses as much as digits as its factorization.

22277213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454651 (or 454644 counting only the distinct ones).

The product of its digits is 2352, while the sum is 26.

The square root of 22277213 is about 4719.8742567996. The cubic root of 22277213 is about 281.3759358315.

Subtracting 22277213 from its reverse (31277222), we obtain a palindrome (9000009).

The spelling of 22277213 in words is "twenty-two million, two hundred seventy-seven thousand, two hundred thirteen".