22001143 has 2 divisors, whose sum is σ = 22001144. Its totient is φ = 22001142.

The previous prime is 22001137. The next prime is 22001173. The reversal of 22001143 is 34110022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22001143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22001113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000571 + 11000572.

It is an arithmetic number, because the mean of its divisors is an integer number (11000572).

Almost surely, 2^22001143 is an apocalyptic number.

22001143 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001143 is an equidigital number, since it uses as much as digits as its factorization.

22001143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22001143 is about 4690.5376024503. The cubic root of 22001143 is about 280.2087856042.

Adding to 22001143 its reverse (34110022), we get a palindrome (56111165).

The spelling of 22001143 in words is "twenty-two million, one thousand, one hundred forty-three".