15891255 has 32 divisors (see below), whose sum is σ = 28797120. Its totient is φ = 8311680.

The previous prime is 15891247. The next prime is 15891259. The reversal of 15891255 is 55219851.

It is a happy number.

It is not a de Polignac number, because 15891255 - 2³ = 15891247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15891259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6045 + ... + 8265.

It is an arithmetic number, because the mean of its divisors is an integer number (899910).

Almost surely, 2^15891255 is an apocalyptic number.

15891255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15891255 is a deficient number, since it is larger than the sum of its proper divisors (12905865).

15891255 is a wasteful number, since it uses less digits than its factorization.

15891255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2282 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 15891255 is about 3986.3836995452. The cubic root of 15891255 is about 251.4120362656.

The spelling of 15891255 in words is "fifteen million, eight hundred ninety-one thousand, two hundred fifty-five".