72415247213 has 2 divisors, whose sum is σ = 72415247214. Its totient is φ = 72415247212.

The previous prime is 72415247209. The next prime is 72415247243. The reversal of 72415247213 is 31274251427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51973968484 + 20441278729 = 227978^2 + 142973^2 .

It is a cyclic number.

It is not a de Polignac number, because 72415247213 - 2² = 72415247209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72415247243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36207623606 + 36207623607.

It is an arithmetic number, because the mean of its divisors is an integer number (36207623607).

Almost surely, 2^72415247213 is an apocalyptic number.

It is an amenable number.

72415247213 is a deficient number, since it is larger than the sum of its proper divisors (1).

72415247213 is an equidigital number, since it uses as much as digits as its factorization.

72415247213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The spelling of 72415247213 in words is "seventy-two billion, four hundred fifteen million, two hundred forty-seven thousand, two hundred thirteen".