221243041 has 16 divisors (see below), whose sum is σ = 232315776. Its totient is φ = 210502656.

The previous prime is 221243023. The next prime is 221243051. The reversal of 221243041 is 140342122.

It is a cyclic number.

It is not a de Polignac number, because 221243041 - 2⁹ = 221242529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221243021) 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, 439596 + ... + 440098.

It is an arithmetic number, because the mean of its divisors is an integer number (14519736).

Almost surely, 2^221243041 is an apocalyptic number.

It is an amenable number.

221243041 is a deficient number, since it is larger than the sum of its proper divisors (11072735).

221243041 is a wasteful number, since it uses less digits than its factorization.

221243041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221243041 is about 14874.2408545781. The cubic root of 221243041 is about 604.8159092020.

Adding to 221243041 its reverse (140342122), we get a palindrome (361585163).

The spelling of 221243041 in words is "two hundred twenty-one million, two hundred forty-three thousand, forty-one".