22072231 has 4 divisors (see below), whose sum is σ = 22105512. Its totient is φ = 22038952.

The previous prime is 22072229. The next prime is 22072241. The reversal of 22072231 is 13227022.

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 22072231 - 2¹ = 22072229 is a prime.

It is a super-2 number, since 2×22072231² = 974366762634722, 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 = 22072199 and 22072208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22072241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15625 + ... + 16978.

It is an arithmetic number, because the mean of its divisors is an integer number (5526378).

Almost surely, 2^22072231 is an apocalyptic number.

22072231 is a deficient number, since it is larger than the sum of its proper divisors (33281).

22072231 is an equidigital number, since it uses as much as digits as its factorization.

22072231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33280.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 22072231 is about 4698.1093005591. The cubic root of 22072231 is about 280.5102557990.

Adding to 22072231 its reverse (13227022), we get a palindrome (35299253).

The spelling of 22072231 in words is "twenty-two million, seventy-two thousand, two hundred thirty-one".