131243131 has 4 divisors (see below), whose sum is σ = 131766264. Its totient is φ = 130720000.

The previous prime is 131243117. The next prime is 131243141. The reversal of 131243131 is 131342131.

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

It is a cyclic number.

It is not a de Polignac number, because 131243131 - 2¹⁹ = 130718843 is a prime.

It is a super-2 number, since 2×131243131² = 34449518869366322, 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 = 131243099 and 131243108.

It is not an unprimeable number, because it can be changed into a prime (131243141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261190 + ... + 261691.

It is an arithmetic number, because the mean of its divisors is an integer number (32941566).

Almost surely, 2^131243131 is an apocalyptic number.

131243131 is a deficient number, since it is larger than the sum of its proper divisors (523133).

131243131 is an equidigital number, since it uses as much as digits as its factorization.

131243131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523132.

The product of its digits is 216, while the sum is 19.

The square root of 131243131 is about 11456.1394457295. The cubic root of 131243131 is about 508.1893126952.

Adding to 131243131 its reverse (131342131), we get a palindrome (262585262).

The spelling of 131243131 in words is "one hundred thirty-one million, two hundred forty-three thousand, one hundred thirty-one".