131155205 has 8 divisors (see below), whose sum is σ = 157524504. Its totient is φ = 104832000.

The previous prime is 131155183. The next prime is 131155249. The reversal of 131155205 is 502551131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23639044 + 107516161 = 4862^2 + 10369^2 .

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

It is not a de Polignac number, because 131155205 - 2²⁰ = 130106629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4916 + ... + 16925.

It is an arithmetic number, because the mean of its divisors is an integer number (19690563).

Almost surely, 2^131155205 is an apocalyptic number.

It is an amenable number.

131155205 is a deficient number, since it is larger than the sum of its proper divisors (26369299).

131155205 is a wasteful number, since it uses less digits than its factorization.

131155205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23047.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 131155205 is about 11452.3012971193. The cubic root of 131155205 is about 508.0758006322.

The spelling of 131155205 in words is "one hundred thirty-one million, one hundred fifty-five thousand, two hundred five".