2103181 has 2 divisors, whose sum is σ = 2103182. Its totient is φ = 2103180.

The previous prime is 2103169. The next prime is 2103187. The reversal of 2103181 is 1813012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 826281 = 1130^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103181 - 2⁵ = 2103149 is a prime.

It is a super-2 number, since 2×2103181² = 8846740637522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051590 + 1051591.

It is an arithmetic number, because the mean of its divisors is an integer number (1051591).

2^2103181 is an apocalyptic number.

It is an amenable number.

2103181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103181 is an equidigital number, since it uses as much as digits as its factorization.

2103181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2103181 is about 1450.2348085741. The cubic root of 2103181 is about 128.1225429630.

Adding to 2103181 its reverse (1813012), we get a palindrome (3916193).

It can be divided in two parts, 21031 and 81, that added together give a palindrome (21112).

The spelling of 2103181 in words is "two million, one hundred three thousand, one hundred eighty-one".