106809915 has 16 divisors (see below), whose sum is σ = 173304576. Its totient is φ = 56162400.

The previous prime is 106809889. The next prime is 106809949. The reversal of 106809915 is 519908601.

It is not a de Polignac number, because 106809915 - 2¹¹ = 106807867 is a prime.

It is a super-2 number, since 2×106809915² = 22816715884614450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49081 + ... + 51210.

It is an arithmetic number, because the mean of its divisors is an integer number (10831536).

Almost surely, 2^106809915 is an apocalyptic number.

106809915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

106809915 is a deficient number, since it is larger than the sum of its proper divisors (66494661).

106809915 is a wasteful number, since it uses less digits than its factorization.

106809915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100370.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 106809915 is about 10334.8882432274. Note that the first 3 decimals coincide. The cubic root of 106809915 is about 474.4646452324.

The spelling of 106809915 in words is "one hundred six million, eight hundred nine thousand, nine hundred fifteen".