100047831 has 24 divisors (see below), whose sum is σ = 148001616. Its totient is φ = 60053760.

The previous prime is 100047821. The next prime is 100047833. The reversal of 100047831 is 138740001.

It is a de Polignac number, because none of the positive numbers 2^k-100047831 is a prime.

It is a super-2 number, since 2×100047831² = 20019136975609122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100047833) 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 23 ways as a sum of consecutive naturals, for example, 18381 + ... + 23193.

It is an arithmetic number, because the mean of its divisors is an integer number (6166734).

Almost surely, 2^100047831 is an apocalyptic number.

100047831 is a deficient number, since it is larger than the sum of its proper divisors (47953785).

100047831 is a wasteful number, since it uses less digits than its factorization.

100047831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883 (or 4870 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 100047831 is about 10002.3912640928. The cubic root of 100047831 is about 464.2328755106.

Adding to 100047831 its reverse (138740001), we get a palindrome (238787832).

The spelling of 100047831 in words is "one hundred million, forty-seven thousand, eight hundred thirty-one".