133631132 has 6 divisors (see below), whose sum is σ = 233854488. Its totient is φ = 66815564.

The previous prime is 133631131. The next prime is 133631167. The reversal of 133631132 is 231136331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133631098 and 133631107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133631131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16703888 + ... + 16703895.

It is an arithmetic number, because the mean of its divisors is an integer number (38975748).

Almost surely, 2^133631132 is an apocalyptic number.

It is an amenable number.

133631132 is a deficient number, since it is larger than the sum of its proper divisors (100223356).

133631132 is a wasteful number, since it uses less digits than its factorization.

133631132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33407787 (or 33407785 counting only the distinct ones).

The product of its digits is 972, while the sum is 23.

The square root of 133631132 is about 11559.8932521023. The cubic root of 133631132 is about 511.2530153277.

Adding to 133631132 its reverse (231136331), we get a palindrome (364767463).

The spelling of 133631132 in words is "one hundred thirty-three million, six hundred thirty-one thousand, one hundred thirty-two".