18223141 has 2 divisors, whose sum is σ = 18223142. Its totient is φ = 18223140.

The previous prime is 18223097. The next prime is 18223157. The reversal of 18223141 is 14132281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 7134241 = 3330^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 18223141 - 2¹⁵ = 18190373 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 (18223181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111570 + 9111571.

It is an arithmetic number, because the mean of its divisors is an integer number (9111571).

Almost surely, 2^18223141 is an apocalyptic number.

It is an amenable number.

18223141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18223141 is an equidigital number, since it uses as much as digits as its factorization.

18223141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 22.

The square root of 18223141 is about 4268.8571070018. The cubic root of 18223141 is about 263.1526484000.

The spelling of 18223141 in words is "eighteen million, two hundred twenty-three thousand, one hundred forty-one".