100443431 has 6 divisors (see below), whose sum is σ = 110404896. Its totient is φ = 91312100.

The previous prime is 100443407. The next prime is 100443439. The reversal of 100443431 is 134344001.

It is a happy number.

It is not a de Polignac number, because 100443431 - 2¹⁸ = 100181287 is a prime.

It is a super-2 number, since 2×100443431² = 20177765662103522, 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 (100443439) 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, 414935 + ... + 415176.

It is an arithmetic number, because the mean of its divisors is an integer number (18400816).

Almost surely, 2^100443431 is an apocalyptic number.

100443431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100443431 is a deficient number, since it is larger than the sum of its proper divisors (9961465).

100443431 is an equidigital number, since it uses as much as digits as its factorization.

100443431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830133 (or 830122 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 100443431 is about 10022.1470254632. The cubic root of 100443431 is about 464.8439465554.

Adding to 100443431 its reverse (134344001), we get a palindrome (234787432).

The spelling of 100443431 in words is "one hundred million, four hundred forty-three thousand, four hundred thirty-one".