331129 has 4 divisors (see below), whose sum is σ = 333684. Its totient is φ = 328576.

The previous prime is 331127. The next prime is 331141. The reversal of 331129 is 921133.

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

It can be written as a sum of positive squares in 2 ways, for example, as 273529 + 57600 = 523^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 331129 - 2¹ = 331127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331127) 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, 1072 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (83421).

2³³¹¹²⁹ is an apocalyptic number.

It is an amenable number.

331129 is a deficient number, since it is larger than the sum of its proper divisors (2555).

331129 is a wasteful number, since it uses less digits than its factorization.

331129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554.

The product of its digits is 162, while the sum is 19.

The square root of 331129 is about 575.4380939771. The cubic root of 331129 is about 69.1829493447.

The spelling of 331129 in words is "three hundred thirty-one thousand, one hundred twenty-nine".