331236 has 24 divisors (see below), whose sum is σ = 859040. Its totient is φ = 110376.

The previous prime is 331231. The next prime is 331241. The reversal of 331236 is 632133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331231) and next prime (331241).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (331231) by changing a digit.

331236 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426 + ... + 1641.

2³³¹²³⁶ is an apocalyptic number.

331236 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

331236 is an abundant number, since it is smaller than the sum of its proper divisors (527804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331236 is a wasteful number, since it uses less digits than its factorization.

331236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080 (or 3072 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 331236 is about 575.5310591098. The cubic root of 331236 is about 69.1904003969.

Adding to 331236 its reverse (632133), we get a palindrome (963369).

The spelling of 331236 in words is "three hundred thirty-one thousand, two hundred thirty-six".