105211247 has 2 divisors, whose sum is σ = 105211248. Its totient is φ = 105211246.

The previous prime is 105211243. The next prime is 105211273. The reversal of 105211247 is 742112501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105211247 - 2² = 105211243 is a prime.

It is a super-2 number, since 2×105211247² = 22138812990590018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105211243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52605623 + 52605624.

It is an arithmetic number, because the mean of its divisors is an integer number (52605624).

Almost surely, 2^105211247 is an apocalyptic number.

105211247 is a deficient number, since it is larger than the sum of its proper divisors (1).

105211247 is an equidigital number, since it uses as much as digits as its factorization.

105211247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 105211247 is about 10257.2533848004. The cubic root of 105211247 is about 472.0855666354.

Adding to 105211247 its reverse (742112501), we get a palindrome (847323748).

The spelling of 105211247 in words is "one hundred five million, two hundred eleven thousand, two hundred forty-seven".