331636 has 12 divisors (see below), whose sum is σ = 614628. Its totient is φ = 156032.

The previous prime is 331613. The next prime is 331651. The reversal of 331636 is 636133.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 176400 + 155236 = 420^2 + 394^2 .

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 331636.

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, 2371 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (51219).

2³³¹⁶³⁶ is an apocalyptic number.

It is an amenable number.

331636 is a deficient number, since it is larger than the sum of its proper divisors (282992).

331636 is a wasteful number, since it uses less digits than its factorization.

331636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898 (or 4896 counting only the distinct ones).

The product of its digits is 972, while the sum is 22.

The square root of 331636 is about 575.8784593992. The cubic root of 331636 is about 69.2182405945.

Adding to 331636 its reverse (636133), we get a palindrome (967769).

The spelling of 331636 in words is "three hundred thirty-one thousand, six hundred thirty-six".