131506031 has 2 divisors, whose sum is σ = 131506032. Its totient is φ = 131506030.

The previous prime is 131506021. The next prime is 131506043. The reversal of 131506031 is 130605131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131506031 - 2⁶ = 131505967 is a prime.

It is a super-2 number, since 2×131506031² = 34587672378745922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 131505994 and 131506012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131506021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65753015 + 65753016.

It is an arithmetic number, because the mean of its divisors is an integer number (65753016).

Almost surely, 2^131506031 is an apocalyptic number.

131506031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131506031 is an equidigital number, since it uses as much as digits as its factorization.

131506031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 131506031 is about 11467.6079022610. The cubic root of 131506031 is about 508.5284132622.

The spelling of 131506031 in words is "one hundred thirty-one million, five hundred six thousand, thirty-one".