8215247 has 2 divisors, whose sum is σ = 8215248. Its totient is φ = 8215246.

The previous prime is 8215237. The next prime is 8215253. The reversal of 8215247 is 7425128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8215247 - 2¹⁰ = 8214223 is a prime.

It is equal to p₅₅₃₂₉₅ and since 8215247 and 553295 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8215237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4107623 + 4107624.

It is an arithmetic number, because the mean of its divisors is an integer number (4107624).

Almost surely, 2^8215247 is an apocalyptic number.

8215247 is a deficient number, since it is larger than the sum of its proper divisors (1).

8215247 is an equidigital number, since it uses as much as digits as its factorization.

8215247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 8215247 is about 2866.2252179478. The cubic root of 8215247 is about 201.7778739906. Note that the first 3 decimals are identical.

It can be divided in two parts, 8215 and 247, that multiplied together give a triangular number (2029105 = T₂₀₁₄).

The spelling of 8215247 in words is "eight million, two hundred fifteen thousand, two hundred forty-seven".