155915 has 4 divisors (see below), whose sum is σ = 187104. Its totient is φ = 124728.

The previous prime is 155893. The next prime is 155921. The reversal of 155915 is 519551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155915 - 2⁶ = 155851 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15587 + ... + 15596.

It is an arithmetic number, because the mean of its divisors is an integer number (46776).

2¹⁵⁵⁹¹⁵ is an apocalyptic number.

155915 is a deficient number, since it is larger than the sum of its proper divisors (31189).

155915 is an equidigital number, since it uses as much as digits as its factorization.

155915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31188.

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

The square root of 155915 is about 394.8607349433. The cubic root of 155915 is about 53.8223471422.

The spelling of 155915 in words is "one hundred fifty-five thousand, nine hundred fifteen".