33554721 has 8 divisors (see below), whose sum is σ = 44778784. Its totient is φ = 22350240.

The previous prime is 33554699. The next prime is 33554737. The reversal of 33554721 is 12745533.

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

It is not a de Polignac number, because 33554721 - 2⁷ = 33554593 is a prime.

It is a super-3 number, since 3×33554721³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (33554761) 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, 271 + ... + 8196.

It is an arithmetic number, because the mean of its divisors is an integer number (5597348).

Almost surely, 2^33554721 is an apocalyptic number.

It is an amenable number.

33554721 is a deficient number, since it is larger than the sum of its proper divisors (11224063).

33554721 is a wasteful number, since it uses less digits than its factorization.

33554721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791.

The product of its digits is 12600, while the sum is 30.

The square root of 33554721 is about 5792.6436969660. The cubic root of 33554721 is about 322.5407147683.

The spelling of 33554721 in words is "thirty-three million, five hundred fifty-four thousand, seven hundred twenty-one".