221041329 has 16 divisors (see below), whose sum is σ = 301762560. Its totient is φ = 143856720.

The previous prime is 221041321. The next prime is 221041357. The reversal of 221041329 is 923140122.

221041329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221041329 - 2³ = 221041321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221041299 and 221041308.

It is not an unprimeable number, because it can be changed into a prime (221041321) 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, 60114 + ... + 63684.

It is an arithmetic number, because the mean of its divisors is an integer number (18860160).

Almost surely, 2^221041329 is an apocalyptic number.

It is an amenable number.

221041329 is a deficient number, since it is larger than the sum of its proper divisors (80721231).

221041329 is a wasteful number, since it uses less digits than its factorization.

221041329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 221041329 is about 14867.4587270320. The cubic root of 221041329 is about 604.6320454577.

The spelling of 221041329 in words is "two hundred twenty-one million, forty-one thousand, three hundred twenty-nine".