16245382221 has 8 divisors (see below), whose sum is σ = 24067232960. Its totient is φ = 10830254796.

The previous prime is 16245382169. The next prime is 16245382273. The reversal of 16245382221 is 12228354261.

16245382221 is a `hidden beast` number, since 1 + 624 + 5 + 3 + 8 + 2 + 2 + 21 = 666.

16245382221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16245382169) and next prime (16245382273).

It is not a de Polignac number, because 16245382221 - 2²⁵ = 16211827789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16245382421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300840385 + ... + 300840438.

It is an arithmetic number, because the mean of its divisors is an integer number (3008404120).

Almost surely, 2^16245382221 is an apocalyptic number.

It is an amenable number.

16245382221 is a deficient number, since it is larger than the sum of its proper divisors (7821850739).

16245382221 is an equidigital number, since it uses as much as digits as its factorization.

16245382221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601680832 (or 601680826 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The spelling of 16245382221 in words is "sixteen billion, two hundred forty-five million, three hundred eighty-two thousand, two hundred twenty-one".