221540041 has 8 divisors (see below), whose sum is σ = 222887744. Its totient is φ = 220196880.

The previous prime is 221540027. The next prime is 221540047. The reversal of 221540041 is 140045122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221540041 - 2⁵ = 221540009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221540047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152380 + ... + 153826.

It is an arithmetic number, because the mean of its divisors is an integer number (27860968).

Almost surely, 2^221540041 is an apocalyptic number.

It is an amenable number.

221540041 is a deficient number, since it is larger than the sum of its proper divisors (1347703).

221540041 is a wasteful number, since it uses less digits than its factorization.

221540041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 221540041 is about 14884.2212090522. The cubic root of 221540041 is about 605.0864261933.

Adding to 221540041 its reverse (140045122), we get a palindrome (361585163).

The spelling of 221540041 in words is "two hundred twenty-one million, five hundred forty thousand, forty-one".