200440181 has 2 divisors, whose sum is σ = 200440182. Its totient is φ = 200440180.

The previous prime is 200440153. The next prime is 200440189. The reversal of 200440181 is 181044002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185885956 + 14554225 = 13634^2 + 3815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200440181 is a prime.

It is a super-2 number, since 2×200440181² = 80352532318625522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200440189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100220090 + 100220091.

It is an arithmetic number, because the mean of its divisors is an integer number (100220091).

Almost surely, 2^200440181 is an apocalyptic number.

It is an amenable number.

200440181 is a deficient number, since it is larger than the sum of its proper divisors (1).

200440181 is an equidigital number, since it uses as much as digits as its factorization.

200440181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 200440181 is about 14157.6898186109. The cubic root of 200440181 is about 585.2322656244.

Adding to 200440181 its reverse (181044002), we get a palindrome (381484183).

The spelling of 200440181 in words is "two hundred million, four hundred forty thousand, one hundred eighty-one".