159997572 has 96 divisors (see below), whose sum is σ = 489431040. Its totient is φ = 44232480.

The previous prime is 159997567. The next prime is 159997589. The reversal of 159997572 is 275799951.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 20023 + ... + 26849.

It is an arithmetic number, because the mean of its divisors is an integer number (5098240).

Almost surely, 2^159997572 is an apocalyptic number.

159997572 is a gapful number since it is divisible by the number (12) 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 159997572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244715520).

159997572 is an abundant number, since it is smaller than the sum of its proper divisors (329433468).

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

159997572 is a wasteful number, since it uses less digits than its factorization.

159997572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878 (or 6870 counting only the distinct ones).

The product of its digits is 1786050, while the sum is 54.

The square root of 159997572 is about 12649.0146651824. The cubic root of 159997572 is about 542.8807772193.

The spelling of 159997572 in words is "one hundred fifty-nine million, nine hundred ninety-seven thousand, five hundred seventy-two".