100331813 has 8 divisors (see below), whose sum is σ = 101303040. Its totient is φ = 99364320.

The previous prime is 100331789. The next prime is 100331821. The reversal of 100331813 is 318133001.

It is a happy number.

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-100331813 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 (100331843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100748 + ... + 101738.

It is an arithmetic number, because the mean of its divisors is an integer number (12662880).

Almost surely, 2^100331813 is an apocalyptic number.

It is an amenable number.

100331813 is a deficient number, since it is larger than the sum of its proper divisors (971227).

100331813 is an equidigital number, since it uses as much as digits as its factorization.

100331813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 100331813 is about 10016.5769103022. The cubic root of 100331813 is about 464.6716964239.

Adding to 100331813 its reverse (318133001), we get a palindrome (418464814).

The spelling of 100331813 in words is "one hundred million, three hundred thirty-one thousand, eight hundred thirteen".