22001147 has 6 divisors (see below), whose sum is σ = 25593228. Its totient is φ = 18858084.

The previous prime is 22001143. The next prime is 22001173. The reversal of 22001147 is 74110022.

It is not a de Polignac number, because 22001147 - 2² = 22001143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224453 + ... + 224550.

It is an arithmetic number, because the mean of its divisors is an integer number (4265538).

Almost surely, 2^22001147 is an apocalyptic number.

22001147 is a deficient number, since it is larger than the sum of its proper divisors (3592081).

22001147 is an equidigital number, since it uses as much as digits as its factorization.

22001147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449017 (or 449010 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 22001147 is about 4690.5380288406. The cubic root of 22001147 is about 280.2088025856.

Adding to 22001147 its reverse (74110022), we get a palindrome (96111169).

The spelling of 22001147 in words is "twenty-two million, one thousand, one hundred forty-seven".