221993041 has 4 divisors (see below), whose sum is σ = 222174900. Its totient is φ = 221811184.

The previous prime is 221993027. The next prime is 221993069. The reversal of 221993041 is 140399122.

221993041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140399122 = 2 ⋅70199561.

It can be written as a sum of positive squares in 2 ways, for example, as 221146641 + 846400 = 14871^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 221993041 - 2¹³ = 221984849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221992994 and 221993012.

It is not an unprimeable number, because it can be changed into a prime (221993011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89086 + ... + 91543.

It is an arithmetic number, because the mean of its divisors is an integer number (55543725).

Almost surely, 2^221993041 is an apocalyptic number.

It is an amenable number.

221993041 is a deficient number, since it is larger than the sum of its proper divisors (181859).

221993041 is a wasteful number, since it uses less digits than its factorization.

221993041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181858.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 221993041 is about 14899.4308951718. The cubic root of 221993041 is about 605.4985676953.

The spelling of 221993041 in words is "two hundred twenty-one million, nine hundred ninety-three thousand, forty-one".