221230847 has 2 divisors, whose sum is σ = 221230848. Its totient is φ = 221230846.

The previous prime is 221230837. The next prime is 221230853. The reversal of 221230847 is 748032122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221230847 - 2¹⁴ = 221214463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221230837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110615423 + 110615424.

It is an arithmetic number, because the mean of its divisors is an integer number (110615424).

Almost surely, 2^221230847 is an apocalyptic number.

221230847 is a deficient number, since it is larger than the sum of its proper divisors (1).

221230847 is an equidigital number, since it uses as much as digits as its factorization.

221230847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 221230847 is about 14873.8309456575. The cubic root of 221230847 is about 604.8047973486.

Adding to 221230847 its reverse (748032122), we get a palindrome (969262969).

The spelling of 221230847 in words is "two hundred twenty-one million, two hundred thirty thousand, eight hundred forty-seven".