4221845091 has 32 divisors (see below), whose sum is σ = 6323466240. Its totient is φ = 2783743200.

The previous prime is 4221845057. The next prime is 4221845129. The reversal of 4221845091 is 1905481224.

4221845091 is a `hidden beast` number, since 422 + 184 + 50 + 9 + 1 = 666.

It is not a de Polignac number, because 4221845091 - 2¹⁸ = 4221582947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4221845791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 931156 + ... + 935678.

It is an arithmetic number, because the mean of its divisors is an integer number (197608320).

Almost surely, 2^4221845091 is an apocalyptic number.

4221845091 is a deficient number, since it is larger than the sum of its proper divisors (2101621149).

4221845091 is a wasteful number, since it uses less digits than its factorization.

4221845091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4904 (or 4898 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 4221845091 is about 64975.7269370647. The cubic root of 4221845091 is about 1616.2210718279.

The spelling of 4221845091 in words is "four billion, two hundred twenty-one million, eight hundred forty-five thousand, ninety-one".