22148897 has 4 divisors (see below), whose sum is σ = 22689156. Its totient is φ = 21608640.

The previous prime is 22148879. The next prime is 22148921. The reversal of 22148897 is 79884122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5494336 + 16654561 = 2344^2 + 4081^2 .

It is not a de Polignac number, because 22148897 - 2⁸ = 22148641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 540217 = 22148897 / (2 + 2 + 1 + 4 + 8 + 8 + 9 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22148197) 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 3 ways as a sum of consecutive naturals, for example, 270068 + ... + 270149.

It is an arithmetic number, because the mean of its divisors is an integer number (5672289).

Almost surely, 2^22148897 is an apocalyptic number.

It is an amenable number.

22148897 is a deficient number, since it is larger than the sum of its proper divisors (540259).

22148897 is an equidigital number, since it uses as much as digits as its factorization.

22148897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540258.

The product of its digits is 64512, while the sum is 41.

The square root of 22148897 is about 4706.2614674495. The cubic root of 22148897 is about 280.8346565951.

It can be divided in two parts, 2214 and 8897, that added together give a palindrome (11111).

The spelling of 22148897 in words is "twenty-two million, one hundred forty-eight thousand, eight hundred ninety-seven".