72176315213 has 2 divisors, whose sum is σ = 72176315214. Its totient is φ = 72176315212.

The previous prime is 72176315209. The next prime is 72176315219. The reversal of 72176315213 is 31251367127.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42783612964 + 29392702249 = 206842^2 + 171443^2 .

It is a cyclic number.

It is not a de Polignac number, because 72176315213 - 2² = 72176315209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72176315219) 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, 36088157606 + 36088157607.

It is an arithmetic number, because the mean of its divisors is an integer number (36088157607).

Almost surely, 2^72176315213 is an apocalyptic number.

It is an amenable number.

72176315213 is a deficient number, since it is larger than the sum of its proper divisors (1).

72176315213 is an equidigital number, since it uses as much as digits as its factorization.

72176315213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The spelling of 72176315213 in words is "seventy-two billion, one hundred seventy-six million, three hundred fifteen thousand, two hundred thirteen".