221850005 has 8 divisors (see below), whose sum is σ = 286698552. Its totient is φ = 163827648.

The previous prime is 221849987. The next prime is 221850037. The reversal of 221850005 is 500058122.

221850005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 31382404 + 190467601 = 5602^2 + 13801^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 221850005 - 2¹² = 221845909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 1706474 + ... + 1706603.

It is an arithmetic number, because the mean of its divisors is an integer number (35837319).

Almost surely, 2^221850005 is an apocalyptic number.

It is an amenable number.

221850005 is a deficient number, since it is larger than the sum of its proper divisors (64848547).

221850005 is a wasteful number, since it uses less digits than its factorization.

221850005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413095.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 221850005 is about 14894.6300726134. The cubic root of 221850005 is about 605.3684934961.

The spelling of 221850005 in words is "two hundred twenty-one million, eight hundred fifty thousand, five".