159999000 has 256 divisors, whose sum is σ = 602035200. Its totient is φ = 34560000.

The previous prime is 159998999. The next prime is 159999011. The reversal of 159999000 is 999951.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398800 + ... + 399200.

It is an arithmetic number, because the mean of its divisors is an integer number (2351700).

Almost surely, 2^159999000 is an apocalyptic number.

159999000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159999000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301017600).

159999000 is an abundant number, since it is smaller than the sum of its proper divisors (442036200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159999000 is a wasteful number, since it uses less digits than its factorization.

159999000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 32805, while the sum is 42.

The square root of 159999000 is about 12649.0711121410. The cubic root of 159999000 is about 542.8823923093.

The spelling of 159999000 in words is "one hundred fifty-nine million, nine hundred ninety-nine thousand".