45221618 has 16 divisors (see below), whose sum is σ = 74250456. Its totient is φ = 20528640.

The previous prime is 45221599. The next prime is 45221621. The reversal of 45221618 is 81612254.

It can be written as a sum of positive squares in 4 ways, for example, as 30880249 + 14341369 = 5557^2 + 3787^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12671 + ... + 15842.

Almost surely, 2^45221618 is an apocalyptic number.

45221618 is a deficient number, since it is larger than the sum of its proper divisors (29028838).

45221618 is a wasteful number, since it uses less digits than its factorization.

45221618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28589.

The product of its digits is 3840, while the sum is 29.

The square root of 45221618 is about 6724.7020751852. The cubic root of 45221618 is about 356.2722793905.

The spelling of 45221618 in words is "forty-five million, two hundred twenty-one thousand, six hundred eighteen".