15900155 has 4 divisors (see below), whose sum is σ = 19080192. Its totient is φ = 12720120.

The previous prime is 15900133. The next prime is 15900167. The reversal of 15900155 is 55100951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55100951 = 547 ⋅100733.

It is not a de Polignac number, because 15900155 - 2¹⁴ = 15883771 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1590011 + ... + 1590020.

It is an arithmetic number, because the mean of its divisors is an integer number (4770048).

Almost surely, 2^15900155 is an apocalyptic number.

15900155 is a deficient number, since it is larger than the sum of its proper divisors (3180037).

15900155 is an equidigital number, since it uses as much as digits as its factorization.

15900155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180036.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 15900155 is about 3987.4998432602. The cubic root of 15900155 is about 251.4589624845.

The spelling of 15900155 in words is "fifteen million, nine hundred thousand, one hundred fifty-five".