72201342173 has 2 divisors, whose sum is σ = 72201342174. Its totient is φ = 72201342172.

The previous prime is 72201342139. The next prime is 72201342251. The reversal of 72201342173 is 37124310227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63626026564 + 8575315609 = 252242^2 + 92603^2 .

It is a cyclic number.

It is not a de Polignac number, because 72201342173 - 2³⁶ = 3481865437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72201345173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36100671086 + 36100671087.

It is an arithmetic number, because the mean of its divisors is an integer number (36100671087).

Almost surely, 2^72201342173 is an apocalyptic number.

It is an amenable number.

72201342173 is a deficient number, since it is larger than the sum of its proper divisors (1).

72201342173 is an equidigital number, since it uses as much as digits as its factorization.

72201342173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 72201342173 in words is "seventy-two billion, two hundred one million, three hundred forty-two thousand, one hundred seventy-three".