22513045 has 4 divisors (see below), whose sum is σ = 27015660. Its totient is φ = 18010432.

The previous prime is 22513039. The next prime is 22513091. The reversal of 22513045 is 54031522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3928324 + 18584721 = 1982^2 + 4311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22513045 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2251300 + ... + 2251309.

It is an arithmetic number, because the mean of its divisors is an integer number (6753915).

Almost surely, 2^22513045 is an apocalyptic number.

It is an amenable number.

22513045 is a deficient number, since it is larger than the sum of its proper divisors (4502615).

22513045 is an equidigital number, since it uses as much as digits as its factorization.

22513045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502614.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 22513045 is about 4744.7913547384. The cubic root of 22513045 is about 282.3653573014.

Adding to 22513045 its reverse (54031522), we get a palindrome (76544567).

The spelling of 22513045 in words is "twenty-two million, five hundred thirteen thousand, forty-five".