4945459221 has 6 divisors (see below), whose sum is σ = 7143441110. Its totient is φ = 3296972808.

The previous prime is 4945459159. The next prime is 4945459223. The reversal of 4945459221 is 1229545494.

4945459221 is a `hidden beast` number, since 4 + 9 + 4 + 54 + 592 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4943636721 + 1822500 = 70311^2 + 1350^2 .

It is not a de Polignac number, because 4945459221 - 2⁷ = 4945459093 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 (4945459223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274747726 + ... + 274747743.

Almost surely, 2^4945459221 is an apocalyptic number.

It is an amenable number.

4945459221 is a deficient number, since it is larger than the sum of its proper divisors (2197981889).

4945459221 is a wasteful number, since it uses less digits than its factorization.

4945459221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549495475 (or 549495472 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 4945459221 is about 70323.9590822360. The cubic root of 4945459221 is about 1703.7356399469.

It can be divided in two parts, 4945 and 459221, that added together give a triangular number (464166 = T₉₆₃).

The spelling of 4945459221 in words is "four billion, nine hundred forty-five million, four hundred fifty-nine thousand, two hundred twenty-one".