221869059 has 12 divisors (see below), whose sum is σ = 298812696. Its totient is φ = 146422528.

The previous prime is 221869049. The next prime is 221869069. The reversal of 221869059 is 950968122.

It is an interprime number because it is at equal distance from previous prime (221869049) and next prime (221869069).

It is not a de Polignac number, because 221869059 - 2⁷ = 221868931 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 221869059.

It is not an unprimeable number, because it can be changed into a prime (221869049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273847 + ... + 274655.

It is an arithmetic number, because the mean of its divisors is an integer number (24901058).

Almost surely, 2^221869059 is an apocalyptic number.

221869059 is a deficient number, since it is larger than the sum of its proper divisors (76943637).

221869059 is an frugal number, since it uses more digits than its factorization.

221869059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 221869059 is about 14895.2696853733. The cubic root of 221869059 is about 605.3858240660.

The spelling of 221869059 in words is "two hundred twenty-one million, eight hundred sixty-nine thousand, fifty-nine".