100431431 has 8 divisors (see below), whose sum is σ = 103306800. Its totient is φ = 97564608.

The previous prime is 100431407. The next prime is 100431439. The reversal of 100431431 is 134134001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100431431 is a prime.

It is a super-2 number, since 2×100431431² = 20172944665415522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100431439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27395 + ... + 30843.

It is an arithmetic number, because the mean of its divisors is an integer number (12913350).

Almost surely, 2^100431431 is an apocalyptic number.

100431431 is a deficient number, since it is larger than the sum of its proper divisors (2875369).

100431431 is an equidigital number, since it uses as much as digits as its factorization.

100431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 100431431 is about 10021.5483334662. The cubic root of 100431431 is about 464.8254341468.

Adding to 100431431 its reverse (134134001), we get a palindrome (234565432).

The spelling of 100431431 in words is "one hundred million, four hundred thirty-one thousand, four hundred thirty-one".