201131 has 8 divisors (see below), whose sum is σ = 234240. Its totient is φ = 169128.

The previous prime is 201121. The next prime is 201139. The reversal of 201131 is 131102.

201131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201131 is a prime.

It is a super-2 number, since 2×201131² = 80907358322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 656.

It is an arithmetic number, because the mean of its divisors is an integer number (29280).

2²⁰¹¹³¹ is an apocalyptic number.

201131 is a deficient number, since it is larger than the sum of its proper divisors (33109).

201131 is an equidigital number, since it uses as much as digits as its factorization.

201131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 201131 is about 448.4763092963. The cubic root of 201131 is about 58.5903830895.

Adding to 201131 its reverse (131102), we get a palindrome (332233).

The spelling of 201131 in words is "two hundred one thousand, one hundred thirty-one".