100431191 has 16 divisors (see below), whose sum is σ = 117190656. Its totient is φ = 84290976.

The previous prime is 100431161. The next prime is 100431211. The reversal of 100431191 is 191134001.

It is a de Polignac number, because none of the positive numbers 2^k-100431191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100431161) 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, 91850 + ... + 92936.

It is an arithmetic number, because the mean of its divisors is an integer number (7324416).

Almost surely, 2^100431191 is an apocalyptic number.

100431191 is a deficient number, since it is larger than the sum of its proper divisors (16759465).

100431191 is a wasteful number, since it uses less digits than its factorization.

100431191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 100431191 is about 10021.5363592615. The cubic root of 100431191 is about 464.8250638836.

Adding to 100431191 its reverse (191134001), we get a palindrome (291565192).

The spelling of 100431191 in words is "one hundred million, four hundred thirty-one thousand, one hundred ninety-one".