2133181 has 8 divisors (see below), whose sum is σ = 2243520. Its totient is φ = 2024352.

The previous prime is 2133167. The next prime is 2133191. The reversal of 2133181 is 1813312.

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 2133181 - 2¹¹ = 2131133 is a prime.

It is a super-2 number, since 2×2133181² = 9100922357522, which contains 22 as substring.

It is a Duffinian number.

2133181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3465 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (280440).

2^2133181 is an apocalyptic number.

It is an amenable number.

2133181 is a deficient number, since it is larger than the sum of its proper divisors (110339).

2133181 is a wasteful number, since it uses less digits than its factorization.

2133181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755.

The product of its digits is 144, while the sum is 19.

The square root of 2133181 is about 1460.5413379977. The cubic root of 2133181 is about 128.7288537866.

Adding to 2133181 its reverse (1813312), we get a palindrome (3946493).

It can be divided in two parts, 21331 and 81, that added together give a palindrome (21412).

The spelling of 2133181 in words is "two million, one hundred thirty-three thousand, one hundred eighty-one".