45663221 has 8 divisors (see below), whose sum is σ = 46171224. Its totient is φ = 45158400.

The previous prime is 45663209. The next prime is 45663239. The reversal of 45663221 is 12236654.

It can be written as a sum of positive squares in 4 ways, for example, as 1918225 + 43744996 = 1385^2 + 6614^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45663221 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 (45663271) 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, 37421 + ... + 38621.

It is an arithmetic number, because the mean of its divisors is an integer number (5771403).

Almost surely, 2^45663221 is an apocalyptic number.

It is an amenable number.

45663221 is a deficient number, since it is larger than the sum of its proper divisors (508003).

45663221 is a wasteful number, since it uses less digits than its factorization.

45663221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591.

The product of its digits is 8640, while the sum is 29.

The square root of 45663221 is about 6757.4566961247. The cubic root of 45663221 is about 357.4282275596.

Adding to 45663221 its reverse (12236654), we get a palindrome (57899875).

The spelling of 45663221 in words is "forty-five million, six hundred sixty-three thousand, two hundred twenty-one".