2155322311 has 4 divisors (see below), whose sum is σ = 2229643800. Its totient is φ = 2081000824.

The previous prime is 2155322297. The next prime is 2155322329. The reversal of 2155322311 is 1132235512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155322311 - 2⁹ = 2155321799 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 (2155322011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37160701 + ... + 37160758.

It is an arithmetic number, because the mean of its divisors is an integer number (557410950).

Almost surely, 2^2155322311 is an apocalyptic number.

2155322311 is a deficient number, since it is larger than the sum of its proper divisors (74321489).

2155322311 is an equidigital number, since it uses as much as digits as its factorization.

2155322311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74321488.

The product of its digits is 1800, while the sum is 25.

The square root of 2155322311 is about 46425.4489585184. The cubic root of 2155322311 is about 1291.7270122585.

Adding to 2155322311 its reverse (1132235512), we get a palindrome (3287557823).

The spelling of 2155322311 in words is "two billion, one hundred fifty-five million, three hundred twenty-two thousand, three hundred eleven".