131234531 has 2 divisors, whose sum is σ = 131234532. Its totient is φ = 131234530.

The previous prime is 131234503. The next prime is 131234533. The reversal of 131234531 is 135432131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131234531 - 2¹⁴ = 131218147 is a prime.

It is a super-2 number, since 2×131234531² = 34445004253579922, which contains 22 as substring.

Together with 131234533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131234497 and 131234506.

It is not a weakly prime, because it can be changed into another prime (131234533) 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 as a sum of consecutive naturals, namely, 65617265 + 65617266.

It is an arithmetic number, because the mean of its divisors is an integer number (65617266).

Almost surely, 2^131234531 is an apocalyptic number.

131234531 is a deficient number, since it is larger than the sum of its proper divisors (1).

131234531 is an equidigital number, since it uses as much as digits as its factorization.

131234531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 131234531 is about 11455.7640949873. The cubic root of 131234531 is about 508.1782123719.

Adding to 131234531 its reverse (135432131), we get a palindrome (266666662).

The spelling of 131234531 in words is "one hundred thirty-one million, two hundred thirty-four thousand, five hundred thirty-one".