221352041 has 6 divisors (see below), whose sum is σ = 229248942. Its totient is φ = 213718400.

The previous prime is 221352037. The next prime is 221352049. The reversal of 221352041 is 140253122.

It can be written as a sum of positive squares in 3 ways, for example, as 4084441 + 217267600 = 2021^2 + 14740^2 .

It is not a de Polignac number, because 221352041 - 2² = 221352037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221352049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130760 + ... + 132441.

It is an arithmetic number, because the mean of its divisors is an integer number (38208157).

Almost surely, 2^221352041 is an apocalyptic number.

It is an amenable number.

221352041 is a deficient number, since it is larger than the sum of its proper divisors (7896901).

221352041 is an equidigital number, since it uses as much as digits as its factorization.

221352041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263259 (or 263230 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 221352041 is about 14877.9044559373. The cubic root of 221352041 is about 604.9152179536.

The spelling of 221352041 in words is "two hundred twenty-one million, three hundred fifty-two thousand, forty-one".