22223431 has 4 divisors (see below), whose sum is σ = 22555192. Its totient is φ = 21891672.

The previous prime is 22223429. The next prime is 22223473. The reversal of 22223431 is 13432222.

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 22223431 - 2¹ = 22223429 is a prime.

It is a super-3 number, since 3×22223431³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22223399 and 22223408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22223491) 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, 165780 + ... + 165913.

It is an arithmetic number, because the mean of its divisors is an integer number (5638798).

Almost surely, 2^22223431 is an apocalyptic number.

22223431 is a deficient number, since it is larger than the sum of its proper divisors (331761).

22223431 is an equidigital number, since it uses as much as digits as its factorization.

22223431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331760.

The product of its digits is 576, while the sum is 19.

The square root of 22223431 is about 4714.1734164114. The cubic root of 22223431 is about 281.1493192881.

Adding to 22223431 its reverse (13432222), we get a palindrome (35655653).

It can be divided in two parts, 222 and 23431, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 22223431 in words is "twenty-two million, two hundred twenty-three thousand, four hundred thirty-one".