133871238831 has 16 divisors (see below), whose sum is σ = 194942367360. Its totient is φ = 81042181920.

The previous prime is 133871238791. The next prime is 133871238883. The reversal of 133871238831 is 138832178331.

It is a de Polignac number, because none of the positive numbers 2^k-133871238831 is a prime.

It is a super-2 number, since 2×133871238831² (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 (133871238031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2267976 + ... + 2326253.

It is an arithmetic number, because the mean of its divisors is an integer number (12183897960).

Almost surely, 2^133871238831 is an apocalyptic number.

133871238831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133871238831 is a deficient number, since it is larger than the sum of its proper divisors (61071128529).

133871238831 is a wasteful number, since it uses less digits than its factorization.

133871238831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595126.

The product of its digits is 580608, while the sum is 48.

The spelling of 133871238831 in words is "one hundred thirty-three billion, eight hundred seventy-one million, two hundred thirty-eight thousand, eight hundred thirty-one".