133631332 has 12 divisors (see below), whose sum is σ = 246163120. Its totient is φ = 63299016.

The previous prime is 133631321. The next prime is 133631363. The reversal of 133631332 is 233136331.

It is a junction number, because it is equal to n+sod(n) for n = 133631297 and 133631306.

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, 879078 + ... + 879229.

Almost surely, 2^133631332 is an apocalyptic number.

It is an amenable number.

133631332 is a deficient number, since it is larger than the sum of its proper divisors (112531788).

133631332 is a wasteful number, since it uses less digits than its factorization.

133631332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758330 (or 1758328 counting only the distinct ones).

The product of its digits is 2916, while the sum is 25.

The square root of 133631332 is about 11559.9019026980. The cubic root of 133631332 is about 511.2532703844.

Adding to 133631332 its reverse (233136331), we get a palindrome (366767663).

The spelling of 133631332 in words is "one hundred thirty-three million, six hundred thirty-one thousand, three hundred thirty-two".