155169 has 16 divisors (see below), whose sum is σ = 263040. Its totient is φ = 88560.

The previous prime is 155167. The next prime is 155171. The reversal of 155169 is 961551.

It is an interprime number because it is at equal distance from previous prime (155167) and next prime (155171).

It is not a de Polignac number, because 155169 - 2¹ = 155167 is a prime.

It is a super-2 number, since 2×155169² = 48154837122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

155169 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (155161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222 + ... + 599.

It is an arithmetic number, because the mean of its divisors is an integer number (16440).

2¹⁵⁵¹⁶⁹ is an apocalyptic number.

It is an amenable number.

155169 is a deficient number, since it is larger than the sum of its proper divisors (107871).

155169 is an equidigital number, since it uses as much as digits as its factorization.

155169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 831 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 155169 is about 393.9149654431. The cubic root of 155169 is about 53.7363693578.

It can be divided in two parts, 155 and 169, that added together give a square (324 = 18²).

The spelling of 155169 in words is "one hundred fifty-five thousand, one hundred sixty-nine".