159891572 has 6 divisors (see below), whose sum is σ = 279810258. Its totient is φ = 79945784.

The previous prime is 159891551. The next prime is 159891577. The reversal of 159891572 is 275198951.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 139334416 + 20557156 = 11804^2 + 4534^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159891577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19986443 + ... + 19986450.

It is an arithmetic number, because the mean of its divisors is an integer number (46635043).

Almost surely, 2^159891572 is an apocalyptic number.

It is an amenable number.

159891572 is a deficient number, since it is larger than the sum of its proper divisors (119918686).

159891572 is a wasteful number, since it uses less digits than its factorization.

159891572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39972897 (or 39972895 counting only the distinct ones).

The product of its digits is 226800, while the sum is 47.

The square root of 159891572 is about 12644.8239212731. The cubic root of 159891572 is about 542.7608627429.

The spelling of 159891572 in words is "one hundred fifty-nine million, eight hundred ninety-one thousand, five hundred seventy-two".