221040041 has 4 divisors (see below), whose sum is σ = 221677392. Its totient is φ = 220402692.

The previous prime is 221040037. The next prime is 221040067. The reversal of 221040041 is 140040122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221040041 - 2² = 221040037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221039998 and 221040025.

It is not an unprimeable number, because it can be changed into a prime (221040241) 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, 318155 + ... + 318848.

It is an arithmetic number, because the mean of its divisors is an integer number (55419348).

Almost surely, 2^221040041 is an apocalyptic number.

It is an amenable number.

221040041 is a deficient number, since it is larger than the sum of its proper divisors (637351).

221040041 is an equidigital number, since it uses as much as digits as its factorization.

221040041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637350.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221040041 is about 14867.4154108910. The cubic root of 221040041 is about 604.6308710656.

Adding to 221040041 its reverse (140040122), we get a palindrome (361080163).

The spelling of 221040041 in words is "two hundred twenty-one million, forty thousand, forty-one".