22543151 has 4 divisors (see below), whose sum is σ = 23523312. Its totient is φ = 21562992.

The previous prime is 22543141. The next prime is 22543181. The reversal of 22543151 is 15134522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22543151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 980137 = 22543151 / (2 + 2 + 5 + 4 + 3 + 1 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22543141) 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, 490046 + ... + 490091.

It is an arithmetic number, because the mean of its divisors is an integer number (5880828).

Almost surely, 2^22543151 is an apocalyptic number.

22543151 is a deficient number, since it is larger than the sum of its proper divisors (980161).

22543151 is an equidigital number, since it uses as much as digits as its factorization.

22543151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980160.

The product of its digits is 1200, while the sum is 23.

The square root of 22543151 is about 4747.9628263077. The cubic root of 22543151 is about 282.4911673955.

Adding to 22543151 its reverse (15134522), we get a palindrome (37677673).

The spelling of 22543151 in words is "twenty-two million, five hundred forty-three thousand, one hundred fifty-one".