15985147 has 4 divisors (see below), whose sum is σ = 16417216. Its totient is φ = 15553080.

The previous prime is 15985141. The next prime is 15985157. The reversal of 15985147 is 74158951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15985147 - 2⁷ = 15985019 is a prime.

It is a super-2 number, since 2×15985147² = 511049849223218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15985141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215979 + ... + 216052.

It is an arithmetic number, because the mean of its divisors is an integer number (4104304).

Almost surely, 2^15985147 is an apocalyptic number.

15985147 is a deficient number, since it is larger than the sum of its proper divisors (432069).

15985147 is an equidigital number, since it uses as much as digits as its factorization.

15985147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432068.

The product of its digits is 50400, while the sum is 40.

The square root of 15985147 is about 3998.1429439178. The cubic root of 15985147 is about 251.9062124747.

The spelling of 15985147 in words is "fifteen million, nine hundred eighty-five thousand, one hundred forty-seven".