159955551 has 36 divisors (see below), whose sum is σ = 276061032. Its totient is φ = 88923744.

The previous prime is 159955519. The next prime is 159955553. The reversal of 159955551 is 155559951.

159955551 is a `hidden beast` number, since 1 + 5 + 9 + 95 + 5 + 551 = 666.

It is not a de Polignac number, because 159955551 - 2⁵ = 159955519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 159955497 and 159955506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159955553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11416 + ... + 21218.

It is an arithmetic number, because the mean of its divisors is an integer number (7668362).

Almost surely, 2^159955551 is an apocalyptic number.

159955551 is a deficient number, since it is larger than the sum of its proper divisors (116105481).

159955551 is a wasteful number, since it uses less digits than its factorization.

159955551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9860 (or 9850 counting only the distinct ones).

The product of its digits is 253125, while the sum is 45.

The square root of 159955551 is about 12647.3535176336. The cubic root of 159955551 is about 542.8332465177.

The spelling of 159955551 in words is "one hundred fifty-nine million, nine hundred fifty-five thousand, five hundred fifty-one".