15985047 has 16 divisors (see below), whose sum is σ = 23345280. Its totient is φ = 9668832.

The previous prime is 15985043. The next prime is 15985087. The reversal of 15985047 is 74058951.

It is not a de Polignac number, because 15985047 - 2² = 15985043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 15984996 and 15985014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15985043) 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, 1173 + ... + 5774.

It is an arithmetic number, because the mean of its divisors is an integer number (1459080).

Almost surely, 2^15985047 is an apocalyptic number.

15985047 is a deficient number, since it is larger than the sum of its proper divisors (7360233).

15985047 is a wasteful number, since it uses less digits than its factorization.

15985047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 15985047 is about 3998.1304380923. The cubic root of 15985047 is about 251.9056871813.

The spelling of 15985047 in words is "fifteen million, nine hundred eighty-five thousand, forty-seven".