108564381 has 12 divisors (see below), whose sum is σ = 162623552. Its totient is φ = 72376092.

The previous prime is 108564377. The next prime is 108564403. The reversal of 108564381 is 183465801.

108564381 is a `hidden beast` number, since 1 + 0 + 8 + 5 + 643 + 8 + 1 = 666.

It is not a de Polignac number, because 108564381 - 2² = 108564377 is a prime.

It is a super-2 number, since 2×108564381² = 23572449643826322, 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 (108564331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223141 + ... + 223626.

Almost surely, 2^108564381 is an apocalyptic number.

It is an amenable number.

108564381 is a deficient number, since it is larger than the sum of its proper divisors (54059171).

108564381 is an frugal number, since it uses more digits than its factorization.

108564381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446782 (or 446770 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 108564381 is about 10419.4232565915. The cubic root of 108564381 is about 477.0484108929.

The spelling of 108564381 in words is "one hundred eight million, five hundred sixty-four thousand, three hundred eighty-one".