102216643 has 2 divisors, whose sum is σ = 102216644. Its totient is φ = 102216642.

The previous prime is 102216617. The next prime is 102216661. The reversal of 102216643 is 346612201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102216643 is a prime.

It is not a weakly prime, because it can be changed into another prime (102216613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51108321 + 51108322.

It is an arithmetic number, because the mean of its divisors is an integer number (51108322).

Almost surely, 2^102216643 is an apocalyptic number.

102216643 is a deficient number, since it is larger than the sum of its proper divisors (1).

102216643 is an equidigital number, since it uses as much as digits as its factorization.

102216643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 102216643 is about 10110.2246760396. The cubic root of 102216643 is about 467.5634321547.

Adding to 102216643 its reverse (346612201), we get a palindrome (448828844).

The spelling of 102216643 in words is "one hundred two million, two hundred sixteen thousand, six hundred forty-three".