321131047 has 2 divisors, whose sum is σ = 321131048. Its totient is φ = 321131046.

The previous prime is 321131011. The next prime is 321131053. The reversal of 321131047 is 740131123.

It is a strong prime.

It is an emirp because it is prime and its reverse (740131123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321131047 - 2²⁷ = 186913319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321131087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160565523 + 160565524.

It is an arithmetic number, because the mean of its divisors is an integer number (160565524).

Almost surely, 2^321131047 is an apocalyptic number.

321131047 is a deficient number, since it is larger than the sum of its proper divisors (1).

321131047 is an equidigital number, since it uses as much as digits as its factorization.

321131047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 321131047 is about 17920.1296591291. The cubic root of 321131047 is about 684.7952907397.

The spelling of 321131047 in words is "three hundred twenty-one million, one hundred thirty-one thousand, forty-seven".