221251041 has 24 divisors (see below), whose sum is σ = 360291680. Its totient is φ = 134089560.

The previous prime is 221251031. The next prime is 221251081. The reversal of 221251041 is 140152122.

It is not a de Polignac number, because 221251041 - 2⁶ = 221250977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221251001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30595 + ... + 37128.

Almost surely, 2^221251041 is an apocalyptic number.

It is an amenable number.

221251041 is a deficient number, since it is larger than the sum of its proper divisors (139040639).

221251041 is a wasteful number, since it uses less digits than its factorization.

221251041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67754 (or 67737 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 221251041 is about 14874.5097734346. The cubic root of 221251041 is about 604.8231990267.

The spelling of 221251041 in words is "two hundred twenty-one million, two hundred fifty-one thousand, forty-one".