108515861 has 4 divisors (see below), whose sum is σ = 108551424. Its totient is φ = 108480300.

The previous prime is 108515851. The next prime is 108515867. The reversal of 108515861 is 168515801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168515801 = 1889 ⋅89209.

It is a cyclic number.

It is not a de Polignac number, because 108515861 - 2¹⁴ = 108499477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108515867) 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, 12725 + ... + 19466.

It is an arithmetic number, because the mean of its divisors is an integer number (27137856).

Almost surely, 2^108515861 is an apocalyptic number.

It is an amenable number.

108515861 is a deficient number, since it is larger than the sum of its proper divisors (35563).

108515861 is an equidigital number, since it uses as much as digits as its factorization.

108515861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35562.

The product of its (nonzero) digits is 9600, while the sum is 35.

The square root of 108515861 is about 10417.0946525411. The cubic root of 108515861 is about 476.9773322151.

The spelling of 108515861 in words is "one hundred eight million, five hundred fifteen thousand, eight hundred sixty-one".