159631551 has 6 divisors (see below), whose sum is σ = 230578920. Its totient is φ = 106421028.

The previous prime is 159631543. The next prime is 159631627. The reversal of 159631551 is 155136951.

159631551 is a `hidden beast` number, since 1 + 596 + 3 + 15 + 51 = 666.

It is not a de Polignac number, because 159631551 - 2³ = 159631543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159631531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8868411 + ... + 8868428.

It is an arithmetic number, because the mean of its divisors is an integer number (38429820).

Almost surely, 2^159631551 is an apocalyptic number.

159631551 is a deficient number, since it is larger than the sum of its proper divisors (70947369).

159631551 is a wasteful number, since it uses less digits than its factorization.

159631551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17736845 (or 17736842 counting only the distinct ones).

The product of its digits is 20250, while the sum is 36.

The square root of 159631551 is about 12634.5380208380. The cubic root of 159631551 is about 542.4664845116.

The spelling of 159631551 in words is "one hundred fifty-nine million, six hundred thirty-one thousand, five hundred fifty-one".