131512343 has 2 divisors, whose sum is σ = 131512344. Its totient is φ = 131512342.

The previous prime is 131512331. The next prime is 131512369. The reversal of 131512343 is 343215131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131512343 - 2¹⁸ = 131250199 is a prime.

It is a super-2 number, since 2×131512343² = 34590992722699298, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131512373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65756171 + 65756172.

It is an arithmetic number, because the mean of its divisors is an integer number (65756172).

Almost surely, 2^131512343 is an apocalyptic number.

131512343 is a deficient number, since it is larger than the sum of its proper divisors (1).

131512343 is an equidigital number, since it uses as much as digits as its factorization.

131512343 is an evil number, because the sum of its binary digits is even.

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

The square root of 131512343 is about 11467.8831089264. The cubic root of 131512343 is about 508.5365492135.

Adding to 131512343 its reverse (343215131), we get a palindrome (474727474).

The spelling of 131512343 in words is "one hundred thirty-one million, five hundred twelve thousand, three hundred forty-three".