22508245 has 4 divisors (see below), whose sum is σ = 27009900. Its totient is φ = 18006592.

The previous prime is 22508209. The next prime is 22508251. The reversal of 22508245 is 54280522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54280522 = 2 ⋅27140261.

It can be written as a sum of positive squares in 2 ways, for example, as 12916836 + 9591409 = 3594^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 22508245 - 2⁷ = 22508117 is a prime.

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, 2250820 + ... + 2250829.

It is an arithmetic number, because the mean of its divisors is an integer number (6752475).

Almost surely, 2^22508245 is an apocalyptic number.

It is an amenable number.

22508245 is a deficient number, since it is larger than the sum of its proper divisors (4501655).

22508245 is an equidigital number, since it uses as much as digits as its factorization.

22508245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501654.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 22508245 is about 4744.2855099583. The cubic root of 22508245 is about 282.3452881955.

Adding to 22508245 its reverse (54280522), we get a palindrome (76788767).

The spelling of 22508245 in words is "twenty-two million, five hundred eight thousand, two hundred forty-five".