131541231 has 4 divisors (see below), whose sum is σ = 175388312. Its totient is φ = 87694152.

The previous prime is 131541227. The next prime is 131541239. The reversal of 131541231 is 132145131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131541231 - 2² = 131541227 is a prime.

It is a super-2 number, since 2×131541231² = 34606190905990722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131541198 and 131541207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131541239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21923536 + ... + 21923541.

It is an arithmetic number, because the mean of its divisors is an integer number (43847078).

Almost surely, 2^131541231 is an apocalyptic number.

131541231 is a deficient number, since it is larger than the sum of its proper divisors (43847081).

131541231 is an equidigital number, since it uses as much as digits as its factorization.

131541231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43847080.

The product of its digits is 360, while the sum is 21.

The square root of 131541231 is about 11469.1425573144. The cubic root of 131541231 is about 508.5737815320.

Adding to 131541231 its reverse (132145131), we get a palindrome (263686362).

The spelling of 131541231 in words is "one hundred thirty-one million, five hundred forty-one thousand, two hundred thirty-one".