15900115 has 16 divisors (see below), whose sum is σ = 23788800. Its totient is φ = 9911520.

The previous prime is 15900113. The next prime is 15900119. The reversal of 15900115 is 51100951.

It is not a de Polignac number, because 15900115 - 2¹ = 15900113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15900113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20265 + ... + 21034.

It is an arithmetic number, because the mean of its divisors is an integer number (1486800).

Almost surely, 2^15900115 is an apocalyptic number.

15900115 is a deficient number, since it is larger than the sum of its proper divisors (7888685).

15900115 is a wasteful number, since it uses less digits than its factorization.

15900115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41322.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 15900115 is about 3987.4948275829. The cubic root of 15900115 is about 251.4587516193.

The spelling of 15900115 in words is "fifteen million, nine hundred thousand, one hundred fifteen".