2133291 has 4 divisors (see below), whose sum is σ = 2844392. Its totient is φ = 1422192.

The previous prime is 2133289. The next prime is 2133293. The reversal of 2133291 is 1923312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2133289) and next prime (2133293).

It is not a de Polignac number, because 2133291 - 2¹ = 2133289 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2133293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355546 + ... + 355551.

It is an arithmetic number, because the mean of its divisors is an integer number (711098).

2^2133291 is an apocalyptic number.

2133291 is a deficient number, since it is larger than the sum of its proper divisors (711101).

2133291 is an equidigital number, since it uses as much as digits as its factorization.

2133291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711100.

The product of its digits is 324, while the sum is 21.

The square root of 2133291 is about 1460.5789947825. The cubic root of 2133291 is about 128.7310664338.

Adding to 2133291 its sum of digits (21), we get a palindrome (2133312).

The spelling of 2133291 in words is "two million, one hundred thirty-three thousand, two hundred ninety-one".