221039 has 12 divisors (see below), whose sum is σ = 277704. Its totient is φ = 174384.

The previous prime is 221021. The next prime is 221047. The reversal of 221039 is 930122.

It is not a de Polignac number, because 221039 - 2⁸ = 220783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464 + ... + 810.

It is an arithmetic number, because the mean of its divisors is an integer number (23142).

2²²¹⁰³⁹ is an apocalyptic number.

221039 is a deficient number, since it is larger than the sum of its proper divisors (56665).

221039 is a wasteful number, since it uses less digits than its factorization.

221039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 221039 is about 470.1478490858. The cubic root of 221039 is about 60.4629921884.

The spelling of 221039 in words is "two hundred twenty-one thousand, thirty-nine".