10221247 has 2 divisors, whose sum is σ = 10221248. Its totient is φ = 10221246.

The previous prime is 10221203. The next prime is 10221283. The reversal of 10221247 is 74212201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110623 + 5110624.

It is an arithmetic number, because the mean of its divisors is an integer number (5110624).

Almost surely, 2^10221247 is an apocalyptic number.

10221247 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221247 is an equidigital number, since it uses as much as digits as its factorization.

10221247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 10221247 is about 3197.0685009865. The cubic root of 10221247 is about 217.0207671943.

Adding to 10221247 its reverse (74212201), we get a palindrome (84433448).

The spelling of 10221247 in words is "ten million, two hundred twenty-one thousand, two hundred forty-seven".