2158311 has 8 divisors (see below), whose sum is σ = 2884720. Its totient is φ = 1435392.

The previous prime is 2158307. The next prime is 2158333. The reversal of 2158311 is 1138512.

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

It is not a de Polignac number, because 2158311 - 2² = 2158307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1485 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (360590).

2^2158311 is an apocalyptic number.

2158311 is a deficient number, since it is larger than the sum of its proper divisors (726409).

2158311 is a wasteful number, since it uses less digits than its factorization.

2158311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745.

The product of its digits is 240, while the sum is 21.

The square root of 2158311 is about 1469.1191238290. The cubic root of 2158311 is about 129.2323796514.

The spelling of 2158311 in words is "two million, one hundred fifty-eight thousand, three hundred eleven".