72218683 has 2 divisors, whose sum is σ = 72218684. Its totient is φ = 72218682.

The previous prime is 72218659. The next prime is 72218711. The reversal of 72218683 is 38681227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72218683 - 2⁵ = 72218651 is a prime.

It is not a weakly prime, because it can be changed into another prime (72212683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36109341 + 36109342.

It is an arithmetic number, because the mean of its divisors is an integer number (36109342).

Almost surely, 2^72218683 is an apocalyptic number.

72218683 is a deficient number, since it is larger than the sum of its proper divisors (1).

72218683 is an equidigital number, since it uses as much as digits as its factorization.

72218683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 72218683 is about 8498.1576238618. The cubic root of 72218683 is about 416.4375231447.

The spelling of 72218683 in words is "seventy-two million, two hundred eighteen thousand, six hundred eighty-three".