221411863 has 2 divisors, whose sum is σ = 221411864. Its totient is φ = 221411862.

The previous prime is 221411857. The next prime is 221411873. The reversal of 221411863 is 368114122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221411863 - 2²⁵ = 187857431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221411833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110705931 + 110705932.

It is an arithmetic number, because the mean of its divisors is an integer number (110705932).

Almost surely, 2^221411863 is an apocalyptic number.

221411863 is a deficient number, since it is larger than the sum of its proper divisors (1).

221411863 is an equidigital number, since it uses as much as digits as its factorization.

221411863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 221411863 is about 14879.9147510999. The cubic root of 221411863 is about 604.9697072918.

Adding to 221411863 its reverse (368114122), we get a palindrome (589525985).

The spelling of 221411863 in words is "two hundred twenty-one million, four hundred eleven thousand, eight hundred sixty-three".