221058 has 12 divisors (see below), whose sum is σ = 478998. Its totient is φ = 73680.

The previous prime is 221047. The next prime is 221059. The reversal of 221058 is 850122.

It can be written as a sum of positive squares in only one way, i.e., 149769 + 71289 = 387^2 + 267^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12281 = 221058 / (2 + 2 + 1 + 0 + 5 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 221058.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 221058.

It is not an unprimeable number, because it can be changed into a prime (221059) by changing a digit.

221058 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6123 + ... + 6158.

2²²¹⁰⁵⁸ is an apocalyptic number.

221058 is an abundant number, since it is smaller than the sum of its proper divisors (257940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221058 is a wasteful number, since it uses less digits than its factorization.

221058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12289 (or 12286 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 221058 is about 470.1680550612. The cubic root of 221058 is about 60.4647245583.

The spelling of 221058 in words is "two hundred twenty-one thousand, fifty-eight".