15990143 has 8 divisors (see below), whose sum is σ = 17346000. Its totient is φ = 14652288.

The previous prime is 15990131. The next prime is 15990151. The reversal of 15990143 is 34109951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15990143 - 2⁴ = 15990127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15990173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2618 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (2168250).

Almost surely, 2^15990143 is an apocalyptic number.

15990143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15990143 is a deficient number, since it is larger than the sum of its proper divisors (1355857).

15990143 is a wasteful number, since it uses less digits than its factorization.

15990143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9001.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 15990143 is about 3998.7676851750. The cubic root of 15990143 is about 251.9324533416.

The spelling of 15990143 in words is "fifteen million, nine hundred ninety thousand, one hundred forty-three".