103209915 has 32 divisors (see below), whose sum is σ = 170081856. Its totient is φ = 53411840.

The previous prime is 103209877. The next prime is 103209917. The reversal of 103209915 is 519902301.

It is not a de Polignac number, because 103209915 - 2¹⁵ = 103177147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103209917) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 157729 + ... + 158381.

It is an arithmetic number, because the mean of its divisors is an integer number (5315058).

Almost surely, 2^103209915 is an apocalyptic number.

103209915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

103209915 is a deficient number, since it is larger than the sum of its proper divisors (66871941).

103209915 is a wasteful number, since it uses less digits than its factorization.

103209915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 103209915 is about 10159.2280710692. The cubic root of 103209915 is about 469.0730409683.

The spelling of 103209915 in words is "one hundred three million, two hundred nine thousand, nine hundred fifteen".