155605159 has 4 divisors (see below), whose sum is σ = 155630416. Its totient is φ = 155579904.

The previous prime is 155605139. The next prime is 155605201. The reversal of 155605159 is 951506551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 155605159 - 2⁷ = 155605031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155605139) 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 3 ways as a sum of consecutive naturals, for example, 3367 + ... + 17959.

It is an arithmetic number, because the mean of its divisors is an integer number (38907604).

Almost surely, 2^155605159 is an apocalyptic number.

155605159 is a deficient number, since it is larger than the sum of its proper divisors (25257).

155605159 is a wasteful number, since it uses less digits than its factorization.

155605159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25256.

The product of its (nonzero) digits is 33750, while the sum is 37.

The square root of 155605159 is about 12474.1796924688. The cubic root of 155605159 is about 537.8667080412.

The spelling of 155605159 in words is "one hundred fifty-five million, six hundred five thousand, one hundred fifty-nine".