155617 has 16 divisors (see below), whose sum is σ = 202752. Its totient is φ = 115920.

The previous prime is 155609. The next prime is 155621. The reversal of 155617 is 716551.

It is not a de Polignac number, because 155617 - 2³ = 155609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155591 and 155600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3288 + ... + 3334.

It is an arithmetic number, because the mean of its divisors is an integer number (12672).

2¹⁵⁵⁶¹⁷ is an apocalyptic number.

It is an amenable number.

155617 is a deficient number, since it is larger than the sum of its proper divisors (47135).

155617 is a wasteful number, since it uses less digits than its factorization.

155617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108.

The product of its digits is 1050, while the sum is 25.

The square root of 155617 is about 394.4832062332. The cubic root of 155617 is about 53.7880350944.

It can be divided in two parts, 15 and 5617, that multiplied together give a triangular number (84255 = T₄₁₀).

The spelling of 155617 in words is "one hundred fifty-five thousand, six hundred seventeen".