22513043 has 24 divisors (see below), whose sum is σ = 27797760. Its totient is φ = 17852400.

The previous prime is 22513039. The next prime is 22513091. The reversal of 22513043 is 34031522.

It is a happy number.

It is not a de Polignac number, because 22513043 - 2² = 22513039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22513033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149018 + ... + 149168.

It is an arithmetic number, because the mean of its divisors is an integer number (1158240).

Almost surely, 2^22513043 is an apocalyptic number.

22513043 is a deficient number, since it is larger than the sum of its proper divisors (5284717).

22513043 is a wasteful number, since it uses less digits than its factorization.

22513043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 22513043 is about 4744.7911439809. The cubic root of 22513043 is about 282.3653489399.

Adding to 22513043 its reverse (34031522), we get a palindrome (56544565).

The spelling of 22513043 in words is "twenty-two million, five hundred thirteen thousand, forty-three".