22397149 has 4 divisors (see below), whose sum is σ = 22539964. Its totient is φ = 22254336.

The previous prime is 22397119. The next prime is 22397153. The reversal of 22397149 is 94179322.

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 2656900 + 19740249 = 1630^2 + 4443^2 .

It is a cyclic number.

It is not a de Polignac number, because 22397149 - 2¹⁹ = 21872861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22397119) 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, 71172 + ... + 71485.

It is an arithmetic number, because the mean of its divisors is an integer number (5634991).

Almost surely, 2^22397149 is an apocalyptic number.

It is an amenable number.

22397149 is a deficient number, since it is larger than the sum of its proper divisors (142815).

22397149 is a wasteful number, since it uses less digits than its factorization.

22397149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142814.

The product of its digits is 27216, while the sum is 37.

The square root of 22397149 is about 4732.5626250479. The cubic root of 22397149 is about 281.8799893414.

The spelling of 22397149 in words is "twenty-two million, three hundred ninety-seven thousand, one hundred forty-nine".