155567 has 4 divisors (see below), whose sum is σ = 164736. Its totient is φ = 146400.

The previous prime is 155557. The next prime is 155569. The reversal of 155567 is 765551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765551 = 73 ⋅10487.

It is a cyclic number.

It is not a de Polignac number, because 155567 - 2¹⁰ = 154543 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4559 + ... + 4592.

It is an arithmetic number, because the mean of its divisors is an integer number (41184).

2¹⁵⁵⁵⁶⁷ is an apocalyptic number.

155567 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

155567 is a deficient number, since it is larger than the sum of its proper divisors (9169).

155567 is an equidigital number, since it uses as much as digits as its factorization.

155567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9168.

The product of its digits is 5250, while the sum is 29.

The square root of 155567 is about 394.4198270878. The cubic root of 155567 is about 53.7822737490.

The spelling of 155567 in words is "one hundred fifty-five thousand, five hundred sixty-seven".