100424321 has 6 divisors (see below), whose sum is σ = 106679430. Its totient is φ = 94516736.

The previous prime is 100424299. The next prime is 100424339. The reversal of 100424321 is 123424001.

It can be written as a sum of positive squares in 3 ways, for example, as 10857025 + 89567296 = 3295^2 + 9464^2 .

It is not a de Polignac number, because 100424321 - 2⁶ = 100424257 is a prime.

It is a super-2 number, since 2×100424321² = 20170088496622082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100424321.

It is not an unprimeable number, because it can be changed into a prime (100424341) 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, 173456 + ... + 174033.

It is an arithmetic number, because the mean of its divisors is an integer number (17779905).

Almost surely, 2^100424321 is an apocalyptic number.

It is an amenable number.

100424321 is a deficient number, since it is larger than the sum of its proper divisors (6255109).

100424321 is an equidigital number, since it uses as much as digits as its factorization.

100424321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347523 (or 347506 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 100424321 is about 10021.1935915838. The cubic root of 100424321 is about 464.8144648490.

Adding to 100424321 its reverse (123424001), we get a palindrome (223848322).

The spelling of 100424321 in words is "one hundred million, four hundred twenty-four thousand, three hundred twenty-one".