105388081 has 4 divisors (see below), whose sum is σ = 107958564. Its totient is φ = 102817600.

The previous prime is 105388061. The next prime is 105388097. The reversal of 105388081 is 180883501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180883501 = 809 ⋅223589.

It can be written as a sum of positive squares in 2 ways, for example, as 43230625 + 62157456 = 6575^2 + 7884^2 .

It is a cyclic number.

It is not a de Polignac number, because 105388081 - 2¹¹ = 105386033 is a prime.

It is a super-2 number, since 2×105388081² = 22213295233725122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105388021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285180 + ... + 1285261.

It is an arithmetic number, because the mean of its divisors is an integer number (26989641).

Almost surely, 2^105388081 is an apocalyptic number.

It is an amenable number.

105388081 is a deficient number, since it is larger than the sum of its proper divisors (2570483).

105388081 is an equidigital number, since it uses as much as digits as its factorization.

105388081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570482.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 105388081 is about 10265.8697147392. The cubic root of 105388081 is about 472.3499048278.

The spelling of 105388081 in words is "one hundred five million, three hundred eighty-eight thousand, eighty-one".