22402543 has 2 divisors, whose sum is σ = 22402544. Its totient is φ = 22402542.

The previous prime is 22402537. The next prime is 22402547. The reversal of 22402543 is 34520422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22402543 - 2²¹ = 20305391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22402547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11201271 + 11201272.

It is an arithmetic number, because the mean of its divisors is an integer number (11201272).

Almost surely, 2^22402543 is an apocalyptic number.

22402543 is a deficient number, since it is larger than the sum of its proper divisors (1).

22402543 is an equidigital number, since it uses as much as digits as its factorization.

22402543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 22402543 is about 4733.1324722640. The cubic root of 22402543 is about 281.9026163079.

Adding to 22402543 its reverse (34520422), we get a palindrome (56922965).

The spelling of 22402543 in words is "twenty-two million, four hundred two thousand, five hundred forty-three".