108643381 has 16 divisors (see below), whose sum is σ = 137479680. Its totient is φ = 83389680.

The previous prime is 108643363. The next prime is 108643393. The reversal of 108643381 is 183346801.

It is not a de Polignac number, because 108643381 - 2⁷ = 108643253 is a prime.

It is a super-2 number, since 2×108643381² = 23606768470222322, 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 (108643321) 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, 5371 + ... + 15688.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^108643381 is an apocalyptic number.

108643381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108643381 is a deficient number, since it is larger than the sum of its proper divisors (28836299).

108643381 is a wasteful number, since it uses less digits than its factorization.

108643381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21144.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 108643381 is about 10423.2135639639. The cubic root of 108643381 is about 477.1640955110.

The spelling of 108643381 in words is "one hundred eight million, six hundred forty-three thousand, three hundred eighty-one".