197155 has 16 divisors (see below), whose sum is σ = 278784. Its totient is φ = 131040.

The previous prime is 197147. The next prime is 197159. The reversal of 197155 is 551791.

197155 = T₂₀ + T₂₁ + ... + T₁₀₅.

It is not a de Polignac number, because 197155 - 2³ = 197147 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197159) 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, 1440 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (17424).

2¹⁹⁷¹⁵⁵ is an apocalyptic number.

197155 is a deficient number, since it is larger than the sum of its proper divisors (81629).

197155 is a wasteful number, since it uses less digits than its factorization.

197155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its digits is 1575, while the sum is 28.

The square root of 197155 is about 444.0213958809. The cubic root of 197155 is about 58.2017350876.

The spelling of 197155 in words is "one hundred ninety-seven thousand, one hundred fifty-five".