155023 has 8 divisors (see below), whose sum is σ = 179280. Its totient is φ = 132480.

The previous prime is 155017. The next prime is 155027. The reversal of 155023 is 320551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155023 - 2⁵ = 154991 is a prime.

It is a Duffinian number.

155023 is a lucky number.

It is a plaindrome in base 9.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 154988 and 155006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155027) 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 7 ways as a sum of consecutive naturals, for example, 228 + ... + 601.

It is an arithmetic number, because the mean of its divisors is an integer number (22410).

2¹⁵⁵⁰²³ is an apocalyptic number.

155023 is a deficient number, since it is larger than the sum of its proper divisors (24257).

155023 is a wasteful number, since it uses less digits than its factorization.

155023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 155023 is about 393.7296026463. The cubic root of 155023 is about 53.7195103807.

Adding to 155023 its reverse (320551), we get a palindrome (475574).

The spelling of 155023 in words is "one hundred fifty-five thousand, twenty-three".