22245947 has 4 divisors (see below), whose sum is σ = 22550760. Its totient is φ = 21941136.

The previous prime is 22245931. The next prime is 22245953. The reversal of 22245947 is 74954222.

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

It is a cyclic number.

It is not a de Polignac number, because 22245947 - 2⁴ = 22245931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22245997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152297 + ... + 152442.

It is an arithmetic number, because the mean of its divisors is an integer number (5637690).

Almost surely, 2^22245947 is an apocalyptic number.

22245947 is a deficient number, since it is larger than the sum of its proper divisors (304813).

22245947 is an equidigital number, since it uses as much as digits as its factorization.

22245947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304812.

The product of its digits is 40320, while the sum is 35.

The square root of 22245947 is about 4716.5609293213. The cubic root of 22245947 is about 281.2442374457.

The spelling of 22245947 in words is "twenty-two million, two hundred forty-five thousand, nine hundred forty-seven".