106405555 has 4 divisors (see below), whose sum is σ = 127686672. Its totient is φ = 85124440.

The previous prime is 106405549. The next prime is 106405561. The reversal of 106405555 is 555504601.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (106405549) and next prime (106405561).

It is not a de Polignac number, because 106405555 - 2⁹ = 106405043 is a prime.

It is a super-2 number, since 2×106405555² = 22644284269716050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10640551 + ... + 10640560.

It is an arithmetic number, because the mean of its divisors is an integer number (31921668).

Almost surely, 2^106405555 is an apocalyptic number.

106405555 is a deficient number, since it is larger than the sum of its proper divisors (21281117).

106405555 is an equidigital number, since it uses as much as digits as its factorization.

106405555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21281116.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 106405555 is about 10315.3068301433. The cubic root of 106405555 is about 473.8651467637.

The spelling of 106405555 in words is "one hundred six million, four hundred five thousand, five hundred fifty-five".