101808381 has 8 divisors (see below), whose sum is σ = 137380320. Its totient is φ = 67054352.

The previous prime is 101808347. The next prime is 101808409. The reversal of 101808381 is 183808101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101808381 - 2⁹ = 101807869 is a prime.

It is a super-2 number, since 2×101808381² = 20729892883682322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101808331) 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, 204186 + ... + 204683.

It is an arithmetic number, because the mean of its divisors is an integer number (17172540).

Almost surely, 2^101808381 is an apocalyptic number.

It is an amenable number.

101808381 is a deficient number, since it is larger than the sum of its proper divisors (35571939).

101808381 is an equidigital number, since it uses as much as digits as its factorization.

101808381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408955.

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 101808381 is about 10090.0139246683. The cubic root of 101808381 is about 466.9401054529.

The spelling of 101808381 in words is "one hundred one million, eight hundred eight thousand, three hundred eighty-one".