16850005221 has 8 divisors (see below), whose sum is σ = 25676198464. Its totient is φ = 9628574400.

The previous prime is 16850005199. The next prime is 16850005309. The reversal of 16850005221 is 12250005861.

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

It is not a de Polignac number, because 16850005221 - 2²³ = 16841616613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16850005021) 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, 401190580 + ... + 401190621.

It is an arithmetic number, because the mean of its divisors is an integer number (3209524808).

Almost surely, 2^16850005221 is an apocalyptic number.

It is an amenable number.

16850005221 is a deficient number, since it is larger than the sum of its proper divisors (8826193243).

16850005221 is an equidigital number, since it uses as much as digits as its factorization.

16850005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802381211.

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 16850005221 in words is "sixteen billion, eight hundred fifty million, five thousand, two hundred twenty-one".