331229 has 4 divisors (see below), whose sum is σ = 338976. Its totient is φ = 323484.

The previous prime is 331217. The next prime is 331231. The reversal of 331229 is 922133.

331229 = T₁₀₂ + T₁₀₃ + ... + T₁₄₄.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 922133 = 277 ⋅3329.

It is a cyclic number.

It is not a de Polignac number, because 331229 - 2⁴ = 331213 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 331229.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331229.

It is not an unprimeable number, because it can be changed into a prime (331249) 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 in 3 ways as a sum of consecutive naturals, for example, 3809 + ... + 3894.

It is an arithmetic number, because the mean of its divisors is an integer number (84744).

2³³¹²²⁹ is an apocalyptic number.

It is an amenable number.

331229 is a deficient number, since it is larger than the sum of its proper divisors (7747).

331229 is an equidigital number, since it uses as much as digits as its factorization.

331229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7746.

The product of its digits is 324, while the sum is 20.

The square root of 331229 is about 575.5249777377. The cubic root of 331229 is about 69.1899129940.

The spelling of 331229 in words is "three hundred thirty-one thousand, two hundred twenty-nine".