331497 has 6 divisors (see below), whose sum is σ = 478842. Its totient is φ = 220992.

The previous prime is 331489. The next prime is 331501. The reversal of 331497 is 794133.

It can be written as a sum of positive squares in only one way, i.e., 184041 + 147456 = 429^2 + 384^2 .

It is not a de Polignac number, because 331497 - 2³ = 331489 is a prime.

It is a super-2 number, since 2×331497² = 219780522018, which contains 22 as substring.

331497 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 331497.

It is not an unprimeable number, because it can be changed into a prime (331447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18408 + ... + 18425.

It is an arithmetic number, because the mean of its divisors is an integer number (79807).

2³³¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

331497 is a deficient number, since it is larger than the sum of its proper divisors (147345).

331497 is a wasteful number, since it uses less digits than its factorization.

331497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36839 (or 36836 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 331497 is about 575.7577615630. The cubic root of 331497 is about 69.2085686651.

It can be divided in two parts, 331 and 497, that added together give a palindrome (828).

The spelling of 331497 in words is "three hundred thirty-one thousand, four hundred ninety-seven".