201912322173 has 8 divisors (see below), whose sum is σ = 269227413408. Its totient is φ = 134602722864.

The previous prime is 201912322159. The next prime is 201912322181. The reversal of 201912322173 is 371223219102.

It is a happy number.

201912322173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201912322173 - 2⁹ = 201912321661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201912329173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286415 + ... + 1434812.

It is an arithmetic number, because the mean of its divisors is an integer number (33653426676).

Almost surely, 2^201912322173 is an apocalyptic number.

It is an amenable number.

201912322173 is a deficient number, since it is larger than the sum of its proper divisors (67315091235).

201912322173 is a wasteful number, since it uses less digits than its factorization.

201912322173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745963.

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 201912322173 in words is "two hundred one billion, nine hundred twelve million, three hundred twenty-two thousand, one hundred seventy-three".