100218381 has 16 divisors (see below), whose sum is σ = 138754560. Its totient is φ = 64272960.

The previous prime is 100218379. The next prime is 100218401. The reversal of 100218381 is 183812001.

It is not a de Polignac number, because 100218381 - 2¹ = 100218379 is a prime.

It is a super-2 number, since 2×100218381² = 20087447780522322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100218301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12975 + ... + 19203.

It is an arithmetic number, because the mean of its divisors is an integer number (8672160).

Almost surely, 2^100218381 is an apocalyptic number.

It is an amenable number.

100218381 is a deficient number, since it is larger than the sum of its proper divisors (38536179).

100218381 is a wasteful number, since it uses less digits than its factorization.

100218381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 100218381 is about 10010.9130952176. The cubic root of 100218381 is about 464.4965159756.

The spelling of 100218381 in words is "one hundred million, two hundred eighteen thousand, three hundred eighty-one".