133140321 has 16 divisors (see below), whose sum is σ = 199201920. Its totient is φ = 87879600.

The previous prime is 133140269. The next prime is 133140349. The reversal of 133140321 is 123041331.

It is a de Polignac number, because none of the positive numbers 2^k-133140321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133140294 and 133140303.

It is not an unprimeable number, because it can be changed into a prime (133140361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21685 + ... + 27138.

It is an arithmetic number, because the mean of its divisors is an integer number (12450120).

Almost surely, 2^133140321 is an apocalyptic number.

It is an amenable number.

133140321 is a deficient number, since it is larger than the sum of its proper divisors (66061599).

133140321 is a wasteful number, since it uses less digits than its factorization.

133140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48933 (or 48927 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133140321 is about 11538.6446777774. The cubic root of 133140321 is about 510.6263239310.

Adding to 133140321 its reverse (123041331), we get a palindrome (256181652).

The spelling of 133140321 in words is "one hundred thirty-three million, one hundred forty thousand, three hundred twenty-one".