83218507 has 2 divisors, whose sum is σ = 83218508. Its totient is φ = 83218506.

The previous prime is 83218483. The next prime is 83218517. The reversal of 83218507 is 70581238.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83218507 - 2¹¹ = 83216459 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (83218517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41609253 + 41609254.

It is an arithmetic number, because the mean of its divisors is an integer number (41609254).

Almost surely, 2^83218507 is an apocalyptic number.

83218507 is a deficient number, since it is larger than the sum of its proper divisors (1).

83218507 is an equidigital number, since it uses as much as digits as its factorization.

83218507 is an evil number, because the sum of its binary digits is even.

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

The square root of 83218507 is about 9122.4178264318. The cubic root of 83218507 is about 436.5895200684.

The spelling of 83218507 in words is "eighty-three million, two hundred eighteen thousand, five hundred seven".