22247899 has 4 divisors (see below), whose sum is σ = 22765336. Its totient is φ = 21730464.

The previous prime is 22247891. The next prime is 22247909. The reversal of 22247899 is 99874222.

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 22247899 - 2³ = 22247891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 517393 = 22247899 / (2 + 2 + 2 + 4 + 7 + 8 + 9 + 9).

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22247891) 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, 258654 + ... + 258739.

It is an arithmetic number, because the mean of its divisors is an integer number (5691334).

Almost surely, 2^22247899 is an apocalyptic number.

22247899 is a deficient number, since it is larger than the sum of its proper divisors (517437).

22247899 is an equidigital number, since it uses as much as digits as its factorization.

22247899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517436.

The product of its digits is 145152, while the sum is 43.

The square root of 22247899 is about 4716.7678552161. The cubic root of 22247899 is about 281.2524632541.

The spelling of 22247899 in words is "twenty-two million, two hundred forty-seven thousand, eight hundred ninety-nine".