100231500042 has 12 divisors (see below), whose sum is σ = 217168250130. Its totient is φ = 33410500008.

The previous prime is 100231499903. The next prime is 100231500043. The reversal of 100231500042 is 240005132001.

100231500042 is a `hidden beast` number, since 100 + 23 + 1 + 500 + 0 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60319851201 + 39911648841 = 245601^2 + 199779^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5568416669 = 100231500042 / (1 + 0 + 0 + 2 + 3 + 1 + 5 + 0 + 0 + 0 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 100231499988 and 100231500024.

It is not an unprimeable number, because it can be changed into a prime (100231500043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2784208317 + ... + 2784208352.

Almost surely, 2^100231500042 is an apocalyptic number.

100231500042 is an abundant number, since it is smaller than the sum of its proper divisors (116936750088).

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

100231500042 is a wasteful number, since it uses less digits than its factorization.

100231500042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5568416677 (or 5568416674 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 100231500042 its reverse (240005132001), we get a palindrome (340236632043).

The spelling of 100231500042 in words is "one hundred billion, two hundred thirty-one million, five hundred thousand, forty-two".