33540321 has 8 divisors (see below), whose sum is σ = 45116640. Its totient is φ = 22162112.

The previous prime is 33540317. The next prime is 33540343. The reversal of 33540321 is 12304533.

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 33540321 - 2² = 33540317 is a prime.

It is a super-2 number, since 2×33540321² = 2249906265566082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33540391) 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, 49131 + ... + 49808.

It is an arithmetic number, because the mean of its divisors is an integer number (5639580).

Almost surely, 2^33540321 is an apocalyptic number.

It is an amenable number.

33540321 is a deficient number, since it is larger than the sum of its proper divisors (11576319).

33540321 is a wasteful number, since it uses less digits than its factorization.

33540321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99055.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 33540321 is about 5791.4006077977. The cubic root of 33540321 is about 322.4945687445.

Adding to 33540321 its reverse (12304533), we get a palindrome (45844854).

The spelling of 33540321 in words is "thirty-three million, five hundred forty thousand, three hundred twenty-one".