321132091 has 16 divisors (see below), whose sum is σ = 409052160. Its totient is φ = 245427840.

The previous prime is 321132047. The next prime is 321132137. The reversal of 321132091 is 190231123.

It is not a de Polignac number, because 321132091 - 2⁷ = 321131963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321132391) 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 15 ways as a sum of consecutive naturals, for example, 68755 + ... + 73276.

It is an arithmetic number, because the mean of its divisors is an integer number (25565760).

Almost surely, 2^321132091 is an apocalyptic number.

321132091 is a deficient number, since it is larger than the sum of its proper divisors (87920069).

321132091 is a wasteful number, since it uses less digits than its factorization.

321132091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142074.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 321132091 is about 17920.1587883590. The cubic root of 321132091 is about 684.7960328308.

The spelling of 321132091 in words is "three hundred twenty-one million, one hundred thirty-two thousand, ninety-one".