331728860173 has 4 divisors (see below), whose sum is σ = 331783670268. Its totient is φ = 331674050080.

The previous prime is 331728860143. The next prime is 331728860189. The reversal of 331728860173 is 371068827133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371068827133 = 9157 ⋅40522969.

It can be written as a sum of positive squares in 2 ways, for example, as 10260271849 + 321468588324 = 101293^2 + 566982^2 .

It is a cyclic number.

It is not a de Polignac number, because 331728860173 - 2¹³ = 331728851981 is a prime.

It is a super-3 number, since 3×331728860173³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331728860123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27395968 + ... + 27408073.

It is an arithmetic number, because the mean of its divisors is an integer number (82945917567).

Almost surely, 2^331728860173 is an apocalyptic number.

It is an amenable number.

331728860173 is a deficient number, since it is larger than the sum of its proper divisors (54810095).

331728860173 is an equidigital number, since it uses as much as digits as its factorization.

331728860173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54810094.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 331728860173 in words is "three hundred thirty-one billion, seven hundred twenty-eight million, eight hundred sixty thousand, one hundred seventy-three".