22397156 has 6 divisors (see below), whose sum is σ = 39195030. Its totient is φ = 11198576.

The previous prime is 22397153. The next prime is 22397161. The reversal of 22397156 is 65179322.

It can be written as a sum of positive squares in only one way, i.e., 17774656 + 4622500 = 4216^2 + 2150^2 .

It is not an unprimeable number, because it can be changed into a prime (22397153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2799641 + ... + 2799648.

It is an arithmetic number, because the mean of its divisors is an integer number (6532505).

Almost surely, 2^22397156 is an apocalyptic number.

It is an amenable number.

22397156 is a deficient number, since it is larger than the sum of its proper divisors (16797874).

22397156 is a wasteful number, since it uses less digits than its factorization.

22397156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599293 (or 5599291 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 22397156 is about 4732.5633646049. The cubic root of 22397156 is about 281.8800187077.

It can be divided in two parts, 223 and 97156, that added together give a palindrome (97379).

The spelling of 22397156 in words is "twenty-two million, three hundred ninety-seven thousand, one hundred fifty-six".