22245857 has 4 divisors (see below), whose sum is σ = 22255296. Its totient is φ = 22236420.

The previous prime is 22245841. The next prime is 22245859. The reversal of 22245857 is 75854222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22245857 - 2⁴ = 22245841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22245859) 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 3 ways as a sum of consecutive naturals, for example, 2132 + ... + 7002.

It is an arithmetic number, because the mean of its divisors is an integer number (5563824).

Almost surely, 2^22245857 is an apocalyptic number.

It is an amenable number.

22245857 is a deficient number, since it is larger than the sum of its proper divisors (9439).

22245857 is an equidigital number, since it uses as much as digits as its factorization.

22245857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9438.

The product of its digits is 44800, while the sum is 35.

The square root of 22245857 is about 4716.5513884617. The cubic root of 22245857 is about 281.2438581704.

The spelling of 22245857 in words is "twenty-two million, two hundred forty-five thousand, eight hundred fifty-seven".