22303231 has 4 divisors (see below), whose sum is σ = 22390272. Its totient is φ = 22216192.

The previous prime is 22303223. The next prime is 22303249. The reversal of 22303231 is 13230322.

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 22303231 - 2³ = 22303223 is a prime.

It is a super-2 number, since 2×22303231² = 994868226078722, which contains 22 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 (22303331) 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, 43135 + ... + 43648.

It is an arithmetic number, because the mean of its divisors is an integer number (5597568).

Almost surely, 2^22303231 is an apocalyptic number.

22303231 is a deficient number, since it is larger than the sum of its proper divisors (87041).

22303231 is an equidigital number, since it uses as much as digits as its factorization.

22303231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87040.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 22303231 is about 4722.6296700038. The cubic root of 22303231 is about 281.4854347306.

Adding to 22303231 its reverse (13230322), we get a palindrome (35533553).

The spelling of 22303231 in words is "twenty-two million, three hundred three thousand, two hundred thirty-one".