72216499 has 2 divisors, whose sum is σ = 72216500. Its totient is φ = 72216498.

The previous prime is 72216449. The next prime is 72216509. The reversal of 72216499 is 99461227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72216499 - 2⁷ = 72216371 is a prime.

It is not a weakly prime, because it can be changed into another prime (72216449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36108249 + 36108250.

It is an arithmetic number, because the mean of its divisors is an integer number (36108250).

Almost surely, 2^72216499 is an apocalyptic number.

72216499 is a deficient number, since it is larger than the sum of its proper divisors (1).

72216499 is an equidigital number, since it uses as much as digits as its factorization.

72216499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 72216499 is about 8498.0291244500. The cubic root of 72216499 is about 416.4333252064.

The spelling of 72216499 in words is "seventy-two million, two hundred sixteen thousand, four hundred ninety-nine".