133324421 has 8 divisors (see below), whose sum is σ = 141447384. Its totient is φ = 125232640.

The previous prime is 133324417. The next prime is 133324441. The reversal of 133324421 is 124423331.

It can be written as a sum of positive squares in 4 ways, for example, as 57547396 + 75777025 = 7586^2 + 8705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133324421 - 2² = 133324417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133324441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331 + ... + 16383.

It is an arithmetic number, because the mean of its divisors is an integer number (17680923).

Almost surely, 2^133324421 is an apocalyptic number.

It is an amenable number.

133324421 is a deficient number, since it is larger than the sum of its proper divisors (8122963).

133324421 is a wasteful number, since it uses less digits than its factorization.

133324421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15591.

The product of its digits is 1728, while the sum is 23.

The square root of 133324421 is about 11546.6194619897. The cubic root of 133324421 is about 510.8615720002.

Adding to 133324421 its reverse (124423331), we get a palindrome (257747752).

The spelling of 133324421 in words is "one hundred thirty-three million, three hundred twenty-four thousand, four hundred twenty-one".