22112399 has 4 divisors (see below), whose sum is σ = 22207536. Its totient is φ = 22017264.

The previous prime is 22112381. The next prime is 22112401. The reversal of 22112399 is 99321122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99321122 = 2 ⋅49660561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22112399 is a prime.

It is a super-4 number, since 4×22112399⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112309) 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, 47219 + ... + 47684.

It is an arithmetic number, because the mean of its divisors is an integer number (5551884).

Almost surely, 2^22112399 is an apocalyptic number.

22112399 is a deficient number, since it is larger than the sum of its proper divisors (95137).

22112399 is an equidigital number, since it uses as much as digits as its factorization.

22112399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95136.

The product of its digits is 1944, while the sum is 29.

The square root of 22112399 is about 4702.3822685954. The cubic root of 22112399 is about 280.6803142434.

The spelling of 22112399 in words is "twenty-two million, one hundred twelve thousand, three hundred ninety-nine".