22044157 has 2 divisors, whose sum is σ = 22044158. Its totient is φ = 22044156.

The previous prime is 22044137. The next prime is 22044203. The reversal of 22044157 is 75144022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21288996 + 755161 = 4614^2 + 869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22044157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22044107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11022078 + 11022079.

It is an arithmetic number, because the mean of its divisors is an integer number (11022079).

Almost surely, 2^22044157 is an apocalyptic number.

It is an amenable number.

22044157 is a deficient number, since it is larger than the sum of its proper divisors (1).

22044157 is an equidigital number, since it uses as much as digits as its factorization.

22044157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 22044157 is about 4695.1205522329. The cubic root of 22044157 is about 280.3912769476.

Adding to 22044157 its reverse (75144022), we get a palindrome (97188179).

It can be divided in two parts, 22044 and 157, that added together give a square (22201 = 149²).

The spelling of 22044157 in words is "twenty-two million, forty-four thousand, one hundred fifty-seven".