201330312173 has 2 divisors, whose sum is σ = 201330312174. Its totient is φ = 201330312172.

The previous prime is 201330312167. The next prime is 201330312217. The reversal of 201330312173 is 371213033102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168003253924 + 33327058249 = 409882^2 + 182557^2 .

It is a cyclic number.

It is not a de Polignac number, because 201330312173 - 2¹⁸ = 201330050029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201330312773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665156086 + 100665156087.

It is an arithmetic number, because the mean of its divisors is an integer number (100665156087).

Almost surely, 2^201330312173 is an apocalyptic number.

It is an amenable number.

201330312173 is a deficient number, since it is larger than the sum of its proper divisors (1).

201330312173 is an equidigital number, since it uses as much as digits as its factorization.

201330312173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

Adding to 201330312173 its reverse (371213033102), we get a palindrome (572543345275).

The spelling of 201330312173 in words is "two hundred one billion, three hundred thirty million, three hundred twelve thousand, one hundred seventy-three".