8218537 has 2 divisors, whose sum is σ = 8218538. Its totient is φ = 8218536.

The previous prime is 8218499. The next prime is 8218541. The reversal of 8218537 is 7358128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8003241 + 215296 = 2829^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 8218537 - 2¹¹ = 8216489 is a prime.

It is not a weakly prime, because it can be changed into another prime (8218597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109268 + 4109269.

It is an arithmetic number, because the mean of its divisors is an integer number (4109269).

Almost surely, 2^8218537 is an apocalyptic number.

It is an amenable number.

8218537 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218537 is an equidigital number, since it uses as much as digits as its factorization.

8218537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 8218537 is about 2866.7990860889. The cubic root of 8218537 is about 201.8048060519.

The spelling of 8218537 in words is "eight million, two hundred eighteen thousand, five hundred thirty-seven".