159651 has 16 divisors (see below), whose sum is σ = 242720. Its totient is φ = 104976.

The previous prime is 159631. The next prime is 159667. The reversal of 159651 is 156951.

159651 is a `hidden beast` number, since 1 + 5 + 9 + 651 = 666.

It is not a de Polignac number, because 159651 - 2¹⁷ = 28579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2151 + ... + 2223.

It is an arithmetic number, because the mean of its divisors is an integer number (15170).

2¹⁵⁹⁶⁵¹ is an apocalyptic number.

159651 is a deficient number, since it is larger than the sum of its proper divisors (83069).

159651 is an frugal number, since it uses more digits than its factorization.

159651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 76 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 159651 is about 399.5635118476. The cubic root of 159651 is about 54.2488514413.

The spelling of 159651 in words is "one hundred fifty-nine thousand, six hundred fifty-one".