106555581 has 20 divisors (see below), whose sum is σ = 173647584. Its totient is φ = 64578600.

The previous prime is 106555571. The next prime is 106555583. The reversal of 106555581 is 185555601.

106555581 is a `hidden beast` number, since 10 + 65 + 5 + 5 + 581 = 666.

It is not a de Polignac number, because 106555581 - 2⁵ = 106555549 is a prime.

It is a super-2 number, since 2×106555581² = 22708183684495122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106555583) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 58905 + ... + 60686.

Almost surely, 2^106555581 is an apocalyptic number.

106555581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

106555581 is a deficient number, since it is larger than the sum of its proper divisors (67092003).

106555581 is a wasteful number, since it uses less digits than its factorization.

106555581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119614 (or 119605 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

The square root of 106555581 is about 10322.5762772672. The cubic root of 106555581 is about 474.0877501377.

The spelling of 106555581 in words is "one hundred six million, five hundred fifty-five thousand, five hundred eighty-one".