102205247 has 2 divisors, whose sum is σ = 102205248. Its totient is φ = 102205246.

The previous prime is 102205189. The next prime is 102205249. The reversal of 102205247 is 742502201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102205247 - 2²² = 98010943 is a prime.

Together with 102205249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102205249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51102623 + 51102624.

It is an arithmetic number, because the mean of its divisors is an integer number (51102624).

Almost surely, 2^102205247 is an apocalyptic number.

102205247 is a deficient number, since it is larger than the sum of its proper divisors (1).

102205247 is an equidigital number, since it uses as much as digits as its factorization.

102205247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 102205247 is about 10109.6610724594. The cubic root of 102205247 is about 467.5460554968.

Adding to 102205247 its reverse (742502201), we get a palindrome (844707448).

The spelling of 102205247 in words is "one hundred two million, two hundred five thousand, two hundred forty-seven".