331465 has 4 divisors (see below), whose sum is σ = 397764. Its totient is φ = 265168.

The previous prime is 331451. The next prime is 331489. The reversal of 331465 is 564133.

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 89401 + 242064 = 299^2 + 492^2 .

It is a cyclic number.

It is not a de Polignac number, because 331465 - 2⁷ = 331337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33142 + ... + 33151.

It is an arithmetic number, because the mean of its divisors is an integer number (99441).

2³³¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

331465 is a deficient number, since it is larger than the sum of its proper divisors (66299).

331465 is an equidigital number, since it uses as much as digits as its factorization.

331465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66298.

The product of its digits is 1080, while the sum is 22.

The square root of 331465 is about 575.7299714276. The cubic root of 331465 is about 69.2063416510.

Adding to 331465 its reverse (564133), we get a palindrome (895598).

It can be divided in two parts, 3 and 31465, that multiplied together give a triangular number (94395 = T₄₃₄).

The spelling of 331465 in words is "three hundred thirty-one thousand, four hundred sixty-five".