22543474 has 4 divisors (see below), whose sum is σ = 33815214. Its totient is φ = 11271736.

The previous prime is 22543463. The next prime is 22543501. The reversal of 22543474 is 47434522.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 13271449 + 9272025 = 3643^2 + 3045^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5635867 + ... + 5635870.

Almost surely, 2^22543474 is an apocalyptic number.

22543474 is a deficient number, since it is larger than the sum of its proper divisors (11271740).

22543474 is a wasteful number, since it uses less digits than its factorization.

22543474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11271739.

The product of its digits is 26880, while the sum is 31.

The square root of 22543474 is about 4747.9968407740. The cubic root of 22543474 is about 282.4925165742.

Adding to 22543474 its reverse (47434522), we get a palindrome (69977996).

The spelling of 22543474 in words is "twenty-two million, five hundred forty-three thousand, four hundred seventy-four".