131540243 has 8 divisors (see below), whose sum is σ = 137507328. Its totient is φ = 125593864.

The previous prime is 131540231. The next prime is 131540257. The reversal of 131540243 is 342045131.

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

It is a cyclic number.

It is not a de Polignac number, because 131540243 - 2⁶ = 131540179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131840243) 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, 8630 + ... + 18372.

It is an arithmetic number, because the mean of its divisors is an integer number (17188416).

Almost surely, 2^131540243 is an apocalyptic number.

131540243 is a deficient number, since it is larger than the sum of its proper divisors (5967085).

131540243 is an equidigital number, since it uses as much as digits as its factorization.

131540243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10353.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 131540243 is about 11469.0994851383. The cubic root of 131540243 is about 508.5725082376.

Adding to 131540243 its reverse (342045131), we get a palindrome (473585374).

The spelling of 131540243 in words is "one hundred thirty-one million, five hundred forty thousand, two hundred forty-three".