159521040 has 240 divisors, whose sum is σ = 632626176. Its totient is φ = 35251200.

The previous prime is 159521029. The next prime is 159521069. The reversal of 159521040 is 40125951.

It is a tau number, because it is divible by the number of its divisors (240).

It is a junction number, because it is equal to n+sod(n) for n = 159520995 and 159521013.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155730 + ... + 156750.

Almost surely, 2^159521040 is an apocalyptic number.

159521040 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 159521040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316313088).

159521040 is an abundant number, since it is smaller than the sum of its proper divisors (473105136).

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

159521040 is a wasteful number, since it uses less digits than its factorization.

159521040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1069 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 159521040 is about 12630.1638944235. The cubic root of 159521040 is about 542.3412746090.

Adding to 159521040 its reverse (40125951), we get a palindrome (199646991).

The spelling of 159521040 in words is "one hundred fifty-nine million, five hundred twenty-one thousand, forty".