45727221 has 8 divisors (see below), whose sum is σ = 61655040. Its totient is φ = 30142112.

The previous prime is 45727217. The next prime is 45727261. The reversal of 45727221 is 12272754.

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 45727221 - 2² = 45727217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45727211) 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, 85365 + ... + 85898.

It is an arithmetic number, because the mean of its divisors is an integer number (7706880).

Almost surely, 2^45727221 is an apocalyptic number.

It is an amenable number.

45727221 is a deficient number, since it is larger than the sum of its proper divisors (15927819).

45727221 is a wasteful number, since it uses less digits than its factorization.

45727221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171355.

The product of its digits is 7840, while the sum is 30.

The square root of 45727221 is about 6762.1905474484. The cubic root of 45727221 is about 357.5951359763.

Adding to 45727221 its reverse (12272754), we get a palindrome (57999975).

The spelling of 45727221 in words is "forty-five million, seven hundred twenty-seven thousand, two hundred twenty-one".