22981145 has 8 divisors (see below), whose sum is σ = 30084480. Its totient is φ = 16713520.

The previous prime is 22981141. The next prime is 22981157. The reversal of 22981145 is 54118922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22981145 - 2² = 22981141 is a prime.

It is a super-2 number, since 2×22981145² = 1056266051022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22981141) 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 7 ways as a sum of consecutive naturals, for example, 208865 + ... + 208974.

It is an arithmetic number, because the mean of its divisors is an integer number (3760560).

Almost surely, 2^22981145 is an apocalyptic number.

It is an amenable number.

22981145 is a deficient number, since it is larger than the sum of its proper divisors (7103335).

22981145 is a wasteful number, since it uses less digits than its factorization.

22981145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417855.

The product of its digits is 5760, while the sum is 32.

The square root of 22981145 is about 4793.8653506330. The cubic root of 22981145 is about 284.3089649835.

It can be divided in two parts, 2298 and 1145, that added together give a palindrome (3443).

The spelling of 22981145 in words is "twenty-two million, nine hundred eighty-one thousand, one hundred forty-five".