109515 has 24 divisors (see below), whose sum is σ = 205200. Its totient is φ = 49728.

The previous prime is 109507. The next prime is 109517. The reversal of 109515 is 515901.

It is a happy number.

It is not a de Polignac number, because 109515 - 2³ = 109507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

109515 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 109491 and 109500.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 109515.

It is not an unprimeable number, because it can be changed into a prime (109517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (8550).

2¹⁰⁹⁵¹⁵ is an apocalyptic number.

109515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

109515 is a deficient number, since it is larger than the sum of its proper divisors (95685).

109515 is a wasteful number, since it uses less digits than its factorization.

109515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 109515 is about 330.9305063000. The cubic root of 109515 is about 47.8436754688.

The spelling of 109515 in words is "one hundred nine thousand, five hundred fifteen".