131111430500 has 24 divisors (see below), whose sum is σ = 286347365304. Its totient is φ = 52444572000.

The previous prime is 131111430497. The next prime is 131111430503. The reversal of 131111430500 is 5034111131.

It is an interprime number because it is at equal distance from previous prime (131111430497) and next prime (131111430503).

It can be written as a sum of positive squares in 4 ways, for example, as 6252381184 + 124859049316 = 79072^2 + 353354^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (131111430503) 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, 131110931 + ... + 131111930.

It is an arithmetic number, because the mean of its divisors is an integer number (11931140221).

Almost surely, 2^131111430500 is an apocalyptic number.

131111430500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131111430500 is an abundant number, since it is smaller than the sum of its proper divisors (155235934804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131111430500 is a wasteful number, since it uses less digits than its factorization.

131111430500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262222880 (or 262222868 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 131111430500 its reverse (5034111131), we get a palindrome (136145541631).

The spelling of 131111430500 in words is "one hundred thirty-one billion, one hundred eleven million, four hundred thirty thousand, five hundred".