22043431 has 8 divisors (see below), whose sum is σ = 22407840. Its totient is φ = 21681792.

The previous prime is 22043419. The next prime is 22043443. The reversal of 22043431 is 13434022.

22043431 is nontrivially palindromic in base 12.

It is an interprime number because it is at equal distance from previous prime (22043419) and next prime (22043443).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22043431 - 2⁹ = 22042919 is a prime.

It is a super-4 number, since 4×22043431⁴ (a number of 30 digits) contains 4444 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 = 22043399 and 22043408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22043471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20206 + ... + 21268.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^22043431 is an apocalyptic number.

22043431 is a deficient number, since it is larger than the sum of its proper divisors (364409).

22043431 is a wasteful number, since it uses less digits than its factorization.

22043431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385.

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

The square root of 22043431 is about 4695.0432372876. The cubic root of 22043431 is about 280.3881987880.

Adding to 22043431 its reverse (13434022), we get a palindrome (35477453).

The spelling of 22043431 in words is "twenty-two million, forty-three thousand, four hundred thirty-one".