221051193 has 16 divisors (see below), whose sum is σ = 324539136. Its totient is φ = 132716240.

The previous prime is 221051191. The next prime is 221051219. The reversal of 221051193 is 391150122.

It is a cyclic number.

It is not a de Polignac number, because 221051193 - 2¹ = 221051191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221051191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27771 + ... + 34832.

It is an arithmetic number, because the mean of its divisors is an integer number (20283696).

Almost surely, 2^221051193 is an apocalyptic number.

It is an amenable number.

221051193 is a deficient number, since it is larger than the sum of its proper divisors (103487943).

221051193 is a wasteful number, since it uses less digits than its factorization.

221051193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62724.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 221051193 is about 14867.7904545363. The cubic root of 221051193 is about 604.6410392536.

The spelling of 221051193 in words is "two hundred twenty-one million, fifty-one thousand, one hundred ninety-three".