22145399 has 4 divisors (see below), whose sum is σ = 22260336. Its totient is φ = 22030464.

The previous prime is 22145363. The next prime is 22145411. The reversal of 22145399 is 99354122.

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 22145399 - 2¹² = 22141303 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 (22145099) 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, 57179 + ... + 57564.

It is an arithmetic number, because the mean of its divisors is an integer number (5565084).

Almost surely, 2^22145399 is an apocalyptic number.

22145399 is a deficient number, since it is larger than the sum of its proper divisors (114937).

22145399 is a wasteful number, since it uses less digits than its factorization.

22145399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114936.

The product of its digits is 19440, while the sum is 35.

The square root of 22145399 is about 4705.8898202147. The cubic root of 22145399 is about 280.8198716399.

The spelling of 22145399 in words is "twenty-two million, one hundred forty-five thousand, three hundred ninety-nine".