155955 has 16 divisors (see below), whose sum is σ = 257184. Its totient is φ = 80640.

The previous prime is 155921. The next prime is 156007. The reversal of 155955 is 559551.

It is not a de Polignac number, because 155955 - 2⁶ = 155891 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (16074).

2¹⁵⁵⁹⁵⁵ is an apocalyptic number.

155955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155955 is a deficient number, since it is larger than the sum of its proper divisors (101229).

155955 is a wasteful number, since it uses less digits than its factorization.

155955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its digits is 5625, while the sum is 30.

The square root of 155955 is about 394.9113824645. The cubic root of 155955 is about 53.8269494571.

The spelling of 155955 in words is "one hundred fifty-five thousand, nine hundred fifty-five".