7155 has 16 divisors (see below), whose sum is σ = 12960. Its totient is φ = 3744.

The previous prime is 7151. The next prime is 7159. The reversal of 7155 is 5517.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7151) and next prime (7159).

It is not a de Polignac number, because 7155 - 2² = 7151 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (7151) 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, 109 + ... + 161.

It is an arithmetic number, because the mean of its divisors is an integer number (810).

2⁷¹⁵⁵ is an apocalyptic number.

7155 is a deficient number, since it is larger than the sum of its proper divisors (5805).

7155 is a wasteful number, since it uses less digits than its factorization.

7155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 61 counting only the distinct ones).

The product of its digits is 175, while the sum is 18.

The square root of 7155 is about 84.5872330792. The cubic root of 7155 is about 19.2694748657.

The spelling of 7155 in words is "seven thousand, one hundred fifty-five".