22501543 has 2 divisors, whose sum is σ = 22501544. Its totient is φ = 22501542.

The previous prime is 22501517. The next prime is 22501561. The reversal of 22501543 is 34510522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22501543 - 2⁵ = 22501511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22501573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11250771 + 11250772.

It is an arithmetic number, because the mean of its divisors is an integer number (11250772).

Almost surely, 2^22501543 is an apocalyptic number.

22501543 is a deficient number, since it is larger than the sum of its proper divisors (1).

22501543 is an equidigital number, since it uses as much as digits as its factorization.

22501543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 22501543 is about 4743.5791339452. The cubic root of 22501543 is about 282.3172619328.

The spelling of 22501543 in words is "twenty-two million, five hundred one thousand, five hundred forty-three".