131731241 has 4 divisors (see below), whose sum is σ = 131788032. Its totient is φ = 131674452.

The previous prime is 131731217. The next prime is 131731267. The reversal of 131731241 is 142137131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 142137131 = 5693 ⋅24967.

It is a cyclic number.

It is not a de Polignac number, because 131731241 - 2²⁶ = 64622377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131733241) 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, 24761 + ... + 29606.

It is an arithmetic number, because the mean of its divisors is an integer number (32947008).

Almost surely, 2^131731241 is an apocalyptic number.

It is an amenable number.

131731241 is a deficient number, since it is larger than the sum of its proper divisors (56791).

131731241 is an equidigital number, since it uses as much as digits as its factorization.

131731241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56790.

The product of its digits is 504, while the sum is 23.

The square root of 131731241 is about 11477.4230992850. The cubic root of 131731241 is about 508.8185403091.

Adding to 131731241 its reverse (142137131), we get a palindrome (273868372).

The spelling of 131731241 in words is "one hundred thirty-one million, seven hundred thirty-one thousand, two hundred forty-one".