72517219 has 2 divisors, whose sum is σ = 72517220. Its totient is φ = 72517218.

The previous prime is 72517213. The next prime is 72517231. The reversal of 72517219 is 91271527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72517219 - 2¹³ = 72509027 is a prime.

It is a super-2 number, since 2×72517219² = 10517494102987922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72517213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36258609 + 36258610.

It is an arithmetic number, because the mean of its divisors is an integer number (36258610).

Almost surely, 2^72517219 is an apocalyptic number.

72517219 is a deficient number, since it is larger than the sum of its proper divisors (1).

72517219 is an equidigital number, since it uses as much as digits as its factorization.

72517219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 34.

The square root of 72517219 is about 8515.7042574293. The cubic root of 72517219 is about 417.0105543587.

The spelling of 72517219 in words is "seventy-two million, five hundred seventeen thousand, two hundred nineteen".