221047 has 2 divisors, whose sum is σ = 221048. Its totient is φ = 221046.

The previous prime is 221021. The next prime is 221059. The reversal of 221047 is 740122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221047 - 2⁷ = 220919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110523 + 110524.

It is an arithmetic number, because the mean of its divisors is an integer number (110524).

2²²¹⁰⁴⁷ is an apocalyptic number.

221047 is a deficient number, since it is larger than the sum of its proper divisors (1).

221047 is an equidigital number, since it uses as much as digits as its factorization.

221047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 221047 is about 470.1563569707. The cubic root of 221047 is about 60.4637216194.

Adding to 221047 its reverse (740122), we get a palindrome (961169).

The spelling of 221047 in words is "two hundred twenty-one thousand, forty-seven", and thus it is an iban number.