2130181 has 8 divisors (see below), whose sum is σ = 2214144. Its totient is φ = 2047920.

The previous prime is 2130173. The next prime is 2130209. The reversal of 2130181 is 1810312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2130181 - 2³ = 2130173 is a prime.

It is a super-2 number, since 2×2130181² = 9075342185522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2496 + ... + 3238.

It is an arithmetic number, because the mean of its divisors is an integer number (276768).

2^2130181 is an apocalyptic number.

It is an amenable number.

2130181 is a deficient number, since it is larger than the sum of its proper divisors (83963).

2130181 is an equidigital number, since it uses as much as digits as its factorization.

2130181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

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

The square root of 2130181 is about 1459.5139601936. The cubic root of 2130181 is about 128.6684795160.

Adding to 2130181 its reverse (1810312), we get a palindrome (3940493).

The spelling of 2130181 in words is "two million, one hundred thirty thousand, one hundred eighty-one".