100042931 has 8 divisors (see below), whose sum is σ = 104934720. Its totient is φ = 95266368.

The previous prime is 100042927. The next prime is 100042933. The reversal of 100042931 is 139240001.

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

It is not a de Polignac number, because 100042931 - 2² = 100042927 is a prime.

It is a super-2 number, since 2×100042931² = 20017176086141522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100042933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27026 + ... + 30503.

It is an arithmetic number, because the mean of its divisors is an integer number (13116840).

Almost surely, 2^100042931 is an apocalyptic number.

100042931 is a deficient number, since it is larger than the sum of its proper divisors (4891789).

100042931 is an equidigital number, since it uses as much as digits as its factorization.

100042931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57613.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 100042931 is about 10002.1463196656. The cubic root of 100042931 is about 464.2252965416.

Adding to 100042931 its reverse (139240001), we get a palindrome (239282932).

The spelling of 100042931 in words is "one hundred million, forty-two thousand, nine hundred thirty-one".