133431332 has 12 divisors (see below), whose sum is σ = 237462960. Its totient is φ = 65584776.

The previous prime is 133431307. The next prime is 133431367. The reversal of 133431332 is 233134331.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 133431298 and 133431307.

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, 282458 + ... + 282929.

It is an arithmetic number, because the mean of its divisors is an integer number (19788580).

Almost surely, 2^133431332 is an apocalyptic number.

It is an amenable number.

133431332 is a deficient number, since it is larger than the sum of its proper divisors (104031628).

133431332 is a wasteful number, since it uses less digits than its factorization.

133431332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565450 (or 565448 counting only the distinct ones).

The product of its digits is 1944, while the sum is 23.

The square root of 133431332 is about 11551.2480710960. The cubic root of 133431332 is about 510.9980864483.

Adding to 133431332 its reverse (233134331), we get a palindrome (366565663).

The spelling of 133431332 in words is "one hundred thirty-three million, four hundred thirty-one thousand, three hundred thirty-two".