131435231 has 6 divisors (see below), whose sum is σ = 133044840. Its totient is φ = 129844868.

The previous prime is 131435209. The next prime is 131435233. The reversal of 131435231 is 132534131.

It is not a de Polignac number, because 131435231 - 2⁶ = 131435167 is a prime.

It is a super-3 number, since 3×131435231³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131435197 and 131435206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131435233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2651 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (22174140).

Almost surely, 2^131435231 is an apocalyptic number.

131435231 is a deficient number, since it is larger than the sum of its proper divisors (1609609).

131435231 is an frugal number, since it uses more digits than its factorization.

131435231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19245 (or 19162 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 131435231 is about 11464.5205307505. The cubic root of 131435231 is about 508.4371366504.

Adding to 131435231 its reverse (132534131), we get a palindrome (263969362).

The spelling of 131435231 in words is "one hundred thirty-one million, four hundred thirty-five thousand, two hundred thirty-one".