22542543 has 40 divisors (see below), whose sum is σ = 35283600. Its totient is φ = 14332032.

The previous prime is 22542539. The next prime is 22542547. The reversal of 22542543 is 34524522.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22542539) and next prime (22542547).

It is not a de Polignac number, because 22542543 - 2² = 22542539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22542547) 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 in 39 ways as a sum of consecutive naturals, for example, 253243 + ... + 253331.

It is an arithmetic number, because the mean of its divisors is an integer number (882090).

Almost surely, 2^22542543 is an apocalyptic number.

22542543 is a deficient number, since it is larger than the sum of its proper divisors (12741057).

22542543 is an equidigital number, since it uses as much as digits as its factorization.

22542543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 204 counting only the distinct ones).

The product of its digits is 9600, while the sum is 27.

The square root of 22542543 is about 4747.8987984160. The cubic root of 22542543 is about 282.4886277303.

The spelling of 22542543 in words is "twenty-two million, five hundred forty-two thousand, five hundred forty-three".