159855557 has 2 divisors, whose sum is σ = 159855558. Its totient is φ = 159855556.

The previous prime is 159855547. The next prime is 159855559. The reversal of 159855557 is 755558951.

It is a happy number.

159855557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150577441 + 9278116 = 12271^2 + 3046^2 .

It is a cyclic number.

It is not a de Polignac number, because 159855557 - 2¹⁰ = 159854533 is a prime.

Together with 159855559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159855559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79927778 + 79927779.

It is an arithmetic number, because the mean of its divisors is an integer number (79927779).

Almost surely, 2^159855557 is an apocalyptic number.

It is an amenable number.

159855557 is a deficient number, since it is larger than the sum of its proper divisors (1).

159855557 is an equidigital number, since it uses as much as digits as its factorization.

159855557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1575000, while the sum is 50.

The square root of 159855557 is about 12643.3997405761. The cubic root of 159855557 is about 542.7201080405.

The spelling of 159855557 in words is "one hundred fifty-nine million, eight hundred fifty-five thousand, five hundred fifty-seven".