22154543 has 4 divisors (see below), whose sum is σ = 23117808. Its totient is φ = 21191280.

The previous prime is 22154533. The next prime is 22154549. The reversal of 22154543 is 34545122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22154543 - 2¹⁰ = 22153519 is a prime.

It is a super-3 number, since 3×22154543³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481598 + ... + 481643.

It is an arithmetic number, because the mean of its divisors is an integer number (5779452).

Almost surely, 2^22154543 is an apocalyptic number.

22154543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

22154543 is a deficient number, since it is larger than the sum of its proper divisors (963265).

22154543 is an equidigital number, since it uses as much as digits as its factorization.

22154543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963264.

The product of its digits is 4800, while the sum is 26.

The square root of 22154543 is about 4706.8612684038. The cubic root of 22154543 is about 280.8585171928.

Adding to 22154543 its reverse (34545122), we get a palindrome (56699665).

The spelling of 22154543 in words is "twenty-two million, one hundred fifty-four thousand, five hundred forty-three".