159825820 has 96 divisors (see below), whose sum is σ = 424972800. Its totient is φ = 49040640.

The previous prime is 159825811. The next prime is 159825851. The reversal of 159825820 is 28528951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102406 + ... + 103954.

It is an arithmetic number, because the mean of its divisors is an integer number (4426800).

Almost surely, 2^159825820 is an apocalyptic number.

159825820 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 159825820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212486400).

159825820 is an abundant number, since it is smaller than the sum of its proper divisors (265146980).

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

159825820 is a wasteful number, since it uses less digits than its factorization.

159825820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 159825820 is about 12642.2236968027. The cubic root of 159825820 is about 542.6864529312.

The spelling of 159825820 in words is "one hundred fifty-nine million, eight hundred twenty-five thousand, eight hundred twenty".