22520045 has 4 divisors (see below), whose sum is σ = 27024060. Its totient is φ = 18016032.

The previous prime is 22520039. The next prime is 22520051. The reversal of 22520045 is 54002522.

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

It is an interprime number because it is at equal distance from previous prime (22520039) and next prime (22520051).

It can be written as a sum of positive squares in 2 ways, for example, as 3736489 + 18783556 = 1933^2 + 4334^2 .

It is a cyclic number.

It is not a de Polignac number, because 22520045 - 2¹⁴ = 22503661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22519999 and 22520026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252000 + ... + 2252009.

It is an arithmetic number, because the mean of its divisors is an integer number (6756015).

Almost surely, 2^22520045 is an apocalyptic number.

It is an amenable number.

22520045 is a deficient number, since it is larger than the sum of its proper divisors (4504015).

22520045 is an equidigital number, since it uses as much as digits as its factorization.

22520045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504014.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22520045 is about 4745.5289483892. The cubic root of 22520045 is about 282.3946196347.

Adding to 22520045 its reverse (54002522), we get a palindrome (76522567).

The spelling of 22520045 in words is "twenty-two million, five hundred twenty thousand, forty-five".