22131443 has 2 divisors, whose sum is σ = 22131444. Its totient is φ = 22131442.

The previous prime is 22131397. The next prime is 22131463. The reversal of 22131443 is 34413122.

It is an a-pointer prime, because the next prime (22131463) can be obtained adding 22131443 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22131443 - 2¹⁸ = 21869299 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22131463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065721 + 11065722.

It is an arithmetic number, because the mean of its divisors is an integer number (11065722).

Almost surely, 2^22131443 is an apocalyptic number.

22131443 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131443 is an equidigital number, since it uses as much as digits as its factorization.

22131443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 22131443 is about 4704.4067638758. The cubic root of 22131443 is about 280.7608684779.

Adding to 22131443 its reverse (34413122), we get a palindrome (56544565).

The spelling of 22131443 in words is "twenty-two million, one hundred thirty-one thousand, four hundred forty-three".