22272427 has 4 divisors (see below), whose sum is σ = 23444680. Its totient is φ = 21100176.

The previous prime is 22272421. The next prime is 22272443. The reversal of 22272427 is 72427222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22272427 is a prime.

It is a super-2 number, since 2×22272427² = 992122008940658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22272395 and 22272404.

It is not an unprimeable number, because it can be changed into a prime (22272421) 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, 586098 + ... + 586135.

It is an arithmetic number, because the mean of its divisors is an integer number (5861170).

Almost surely, 2^22272427 is an apocalyptic number.

22272427 is a deficient number, since it is larger than the sum of its proper divisors (1172253).

22272427 is a wasteful number, since it uses less digits than its factorization.

22272427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172252.

The product of its digits is 6272, while the sum is 28.

The square root of 22272427 is about 4719.3672245334. The cubic root of 22272427 is about 281.3557842731.

Adding to 22272427 its reverse (72427222), we get a palindrome (94699649).

The spelling of 22272427 in words is "twenty-two million, two hundred seventy-two thousand, four hundred twenty-seven".