106681821 has 8 divisors (see below), whose sum is σ = 142581984. Its totient is φ = 70951440.

The previous prime is 106681801. The next prime is 106681823. The reversal of 106681821 is 128186601.

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

It is not a de Polignac number, because 106681821 - 2¹⁹ = 106157533 is a prime.

It is a super-2 number, since 2×106681821² = 22762021863752082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106681823) 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, 40971 + ... + 43496.

It is an arithmetic number, because the mean of its divisors is an integer number (17822748).

Almost surely, 2^106681821 is an apocalyptic number.

It is an amenable number.

106681821 is a deficient number, since it is larger than the sum of its proper divisors (35900163).

106681821 is an equidigital number, since it uses as much as digits as its factorization.

106681821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84891.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 106681821 is about 10328.6892198381. The cubic root of 106681821 is about 474.2748988463.

The spelling of 106681821 in words is "one hundred six million, six hundred eighty-one thousand, eight hundred twenty-one".