22981147 has 12 divisors (see below), whose sum is σ = 26897616. Its totient is φ = 19577040.

The previous prime is 22981141. The next prime is 22981157. The reversal of 22981147 is 74118922.

It is not a de Polignac number, because 22981147 - 2⁷ = 22981019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22981141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7122 + ... + 9832.

It is an arithmetic number, because the mean of its divisors is an integer number (2241468).

Almost surely, 2^22981147 is an apocalyptic number.

22981147 is a deficient number, since it is larger than the sum of its proper divisors (3916469).

22981147 is a wasteful number, since it uses less digits than its factorization.

22981147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2891 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 22981147 is about 4793.8655592330. The cubic root of 22981147 is about 284.3089732311.

The spelling of 22981147 in words is "twenty-two million, nine hundred eighty-one thousand, one hundred forty-seven".