100424643281 has 4 divisors (see below), whose sum is σ = 100587406692. Its totient is φ = 100261879872.

The previous prime is 100424643233. The next prime is 100424643283. The reversal of 100424643281 is 182346424001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3068162881 + 97356480400 = 55391^2 + 312020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100424643281 is a prime.

It is a super-2 number, since 2×100424643281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100424643283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81380780 + ... + 81382013.

It is an arithmetic number, because the mean of its divisors is an integer number (25146851673).

Almost surely, 2^100424643281 is an apocalyptic number.

It is an amenable number.

100424643281 is a deficient number, since it is larger than the sum of its proper divisors (162763411).

100424643281 is an equidigital number, since it uses as much as digits as its factorization.

100424643281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162763410.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 100424643281 in words is "one hundred billion, four hundred twenty-four million, six hundred forty-three thousand, two hundred eighty-one".