159451985 has 48 divisors (see below), whose sum is σ = 250967808. Its totient is φ = 95018880.

The previous prime is 159451967. The next prime is 159451991. The reversal of 159451985 is 589154951.

It is a happy number.

It is not a de Polignac number, because 159451985 - 2¹² = 159447889 is a prime.

It is a Curzon number.

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, 96587 + ... + 98223.

It is an arithmetic number, because the mean of its divisors is an integer number (5228496).

Almost surely, 2^159451985 is an apocalyptic number.

It is an amenable number.

159451985 is a deficient number, since it is larger than the sum of its proper divisors (91515823).

159451985 is a wasteful number, since it uses less digits than its factorization.

159451985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694 (or 1683 counting only the distinct ones).

The product of its digits is 324000, while the sum is 47.

The square root of 159451985 is about 12627.4298651784. The cubic root of 159451985 is about 542.2630053472.

The spelling of 159451985 in words is "one hundred fifty-nine million, four hundred fifty-one thousand, nine hundred eighty-five".