221260005 has 24 divisors (see below), whose sum is σ = 397723872. Its totient is φ = 118004688.

The previous prime is 221260003. The next prime is 221260009. The reversal of 221260005 is 500062122.

It is not a de Polignac number, because 221260005 - 2¹ = 221260003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221260005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221260003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89839 + ... + 92268.

It is an arithmetic number, because the mean of its divisors is an integer number (16571828).

Almost surely, 2^221260005 is an apocalyptic number.

It is an amenable number.

221260005 is a deficient number, since it is larger than the sum of its proper divisors (176463867).

221260005 is an equidigital number, since it uses as much as digits as its factorization.

221260005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182127 (or 182115 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 221260005 is about 14874.8110912374. The cubic root of 221260005 is about 604.8313670665.

The spelling of 221260005 in words is "two hundred twenty-one million, two hundred sixty thousand, five".