123171595215 has 32 divisors (see below), whose sum is σ = 205298227200. Its totient is φ = 62989176960.

The previous prime is 123171595207. The next prime is 123171595249. The reversal of 123171595215 is 512595171321.

It is a happy number.

It is not a de Polignac number, because 123171595215 - 2³ = 123171595207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1164385 + ... + 1265754.

It is an arithmetic number, because the mean of its divisors is an integer number (6415569600).

Almost surely, 2^123171595215 is an apocalyptic number.

123171595215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123171595215 is a deficient number, since it is larger than the sum of its proper divisors (82126631985).

123171595215 is a wasteful number, since it uses less digits than its factorization.

123171595215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430287.

The product of its digits is 94500, while the sum is 42.

The spelling of 123171595215 in words is "one hundred twenty-three billion, one hundred seventy-one million, five hundred ninety-five thousand, two hundred fifteen".