131507071 has 4 divisors (see below), whose sum is σ = 132862912. Its totient is φ = 130151232.

The previous prime is 131507069. The next prime is 131507093. The reversal of 131507071 is 170705131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170705131 = 593 ⋅287867.

It is a cyclic number.

It is not a de Polignac number, because 131507071 - 2¹ = 131507069 is a prime.

It is a super-4 number, since 4×131507071⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131507011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677775 + ... + 677968.

It is an arithmetic number, because the mean of its divisors is an integer number (33215728).

Almost surely, 2^131507071 is an apocalyptic number.

131507071 is a deficient number, since it is larger than the sum of its proper divisors (1355841).

131507071 is an equidigital number, since it uses as much as digits as its factorization.

131507071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355840.

The product of its (nonzero) digits is 735, while the sum is 25.

The square root of 131507071 is about 11467.6532472865. The cubic root of 131507071 is about 508.5297538044.

The spelling of 131507071 in words is "one hundred thirty-one million, five hundred seven thousand, seventy-one".