22381157 has 2 divisors, whose sum is σ = 22381158. Its totient is φ = 22381156.

The previous prime is 22381133. The next prime is 22381169. The reversal of 22381157 is 75118322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14092516 + 8288641 = 3754^2 + 2879^2 .

It is a cyclic number.

It is not a de Polignac number, because 22381157 - 2¹⁰ = 22380133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22381057) 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, 11190578 + 11190579.

It is an arithmetic number, because the mean of its divisors is an integer number (11190579).

Almost surely, 2^22381157 is an apocalyptic number.

It is an amenable number.

22381157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22381157 is an equidigital number, since it uses as much as digits as its factorization.

22381157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 22381157 is about 4730.8727524633. The cubic root of 22381157 is about 281.8128841025.

Adding to 22381157 its reverse (75118322), we get a palindrome (97499479).

The spelling of 22381157 in words is "twenty-two million, three hundred eighty-one thousand, one hundred fifty-seven".