2731173123 has 24 divisors (see below), whose sum is σ = 4241114640. Its totient is φ = 1558824960.

The previous prime is 2731173119. The next prime is 2731173127. The reversal of 2731173123 is 3213711372.

It is an interprime number because it is at equal distance from previous prime (2731173119) and next prime (2731173127).

It is not a de Polignac number, because 2731173123 - 2² = 2731173119 is a prime.

It is a super-3 number, since 3×2731173123³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2731173127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118963 + ... + 140051.

It is an arithmetic number, because the mean of its divisors is an integer number (176713110).

Almost surely, 2^2731173123 is an apocalyptic number.

2731173123 is a deficient number, since it is larger than the sum of its proper divisors (1509941517).

2731173123 is a wasteful number, since it uses less digits than its factorization.

2731173123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21987 (or 21980 counting only the distinct ones).

The product of its digits is 5292, while the sum is 30.

The square root of 2731173123 is about 52260.6268906143. The cubic root of 2731173123 is about 1397.8151504158.

Adding to 2731173123 its reverse (3213711372), we get a palindrome (5944884495).

The spelling of 2731173123 in words is "two billion, seven hundred thirty-one million, one hundred seventy-three thousand, one hundred twenty-three".