128347212831 has 8 divisors (see below), whose sum is σ = 171864079920. Its totient is φ = 85197577152.

The previous prime is 128347212827. The next prime is 128347212839. The reversal of 128347212831 is 138212743821.

It is a happy number.

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

It is not a de Polignac number, because 128347212831 - 2² = 128347212827 is a prime.

It is a super-2 number, since 2×128347212831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128347212839) 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, 91807036 + ... + 91808433.

It is an arithmetic number, because the mean of its divisors is an integer number (21483009990).

Almost surely, 2^128347212831 is an apocalyptic number.

128347212831 is a deficient number, since it is larger than the sum of its proper divisors (43516867089).

128347212831 is a wasteful number, since it uses less digits than its factorization.

128347212831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183615705.

The product of its digits is 129024, while the sum is 42.

The spelling of 128347212831 in words is "one hundred twenty-eight billion, three hundred forty-seven million, two hundred twelve thousand, eight hundred thirty-one".