22261399 has 4 divisors (see below), whose sum is σ = 22398136. Its totient is φ = 22124664.

The previous prime is 22261391. The next prime is 22261417. The reversal of 22261399 is 99316222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22261399 - 2³ = 22261391 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 (22261391) 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, 68124 + ... + 68449.

It is an arithmetic number, because the mean of its divisors is an integer number (5599534).

Almost surely, 2^22261399 is an apocalyptic number.

22261399 is a deficient number, since it is larger than the sum of its proper divisors (136737).

22261399 is a wasteful number, since it uses less digits than its factorization.

22261399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136736.

The product of its digits is 11664, while the sum is 34.

The square root of 22261399 is about 4718.1987028950. The cubic root of 22261399 is about 281.3093396439.

The spelling of 22261399 in words is "twenty-two million, two hundred sixty-one thousand, three hundred ninety-nine".