331811136 has 84 divisors (see below), whose sum is σ = 1001166400. Its totient is φ = 104779008.

The previous prime is 331811107. The next prime is 331811141. The reversal of 331811136 is 631118133.

It is a super-2 number, since 2×331811136² = 220197259947220992, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4216 + ... + 26103.

Almost surely, 2^331811136 is an apocalyptic number.

331811136 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331811136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500583200).

331811136 is an abundant number, since it is smaller than the sum of its proper divisors (669355264).

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

331811136 is a wasteful number, since it uses less digits than its factorization.

331811136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30356 (or 30343 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 331811136 is about 18215.6837917219. The cubic root of 331811136 is about 692.3042310026.

Adding to 331811136 its reverse (631118133), we get a palindrome (962929269).

The spelling of 331811136 in words is "three hundred thirty-one million, eight hundred eleven thousand, one hundred thirty-six".