131178031 has 2 divisors, whose sum is σ = 131178032. Its totient is φ = 131178030.

The previous prime is 131178017. The next prime is 131178043. The reversal of 131178031 is 130871131.

It is a strong prime.

It is an emirp because it is prime and its reverse (130871131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131178031 - 2¹⁵ = 131145263 is a prime.

It is a super-2 number, since 2×131178031² = 34415351634073922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131177987 and 131178005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131172031) 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, 65589015 + 65589016.

It is an arithmetic number, because the mean of its divisors is an integer number (65589016).

Almost surely, 2^131178031 is an apocalyptic number.

131178031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131178031 is an equidigital number, since it uses as much as digits as its factorization.

131178031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 131178031 is about 11453.2978220249. The cubic root of 131178031 is about 508.1052737680.

The spelling of 131178031 in words is "one hundred thirty-one million, one hundred seventy-eight thousand, thirty-one".