159551 has 8 divisors (see below), whose sum is σ = 190464. Its totient is φ = 130680.

The previous prime is 159541. The next prime is 159553. The reversal of 159551 is 155951.

159551 = T₂₁₀ + T₂₁₁ + ... + T₂₁₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159551 - 2¹⁰ = 158527 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 159551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 656.

It is an arithmetic number, because the mean of its divisors is an integer number (23808).

2¹⁵⁹⁵⁵¹ is an apocalyptic number.

159551 is a deficient number, since it is larger than the sum of its proper divisors (30913).

159551 is an equidigital number, since it uses as much as digits as its factorization.

159551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its digits is 1125, while the sum is 26.

The square root of 159551 is about 399.4383556946. The cubic root of 159551 is about 54.2375225256.

Subtracting from 159551 its reverse (155951), we obtain a square (3600 = 60²).

The spelling of 159551 in words is "one hundred fifty-nine thousand, five hundred fifty-one".