45533721 has 16 divisors (see below), whose sum is σ = 63553536. Its totient is φ = 28943376.

The previous prime is 45533711. The next prime is 45533723. The reversal of 45533721 is 12733554.

45533721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45533721 - 2⁹ = 45533209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45533723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25566 + ... + 27288.

It is an arithmetic number, because the mean of its divisors is an integer number (3972096).

Almost surely, 2^45533721 is an apocalyptic number.

It is an amenable number.

45533721 is a deficient number, since it is larger than the sum of its proper divisors (18019815).

45533721 is a wasteful number, since it uses less digits than its factorization.

45533721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132.

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

The square root of 45533721 is about 6747.8678854880. The cubic root of 45533721 is about 357.0900211590.

The spelling of 45533721 in words is "forty-five million, five hundred thirty-three thousand, seven hundred twenty-one".