131710509 has 32 divisors (see below), whose sum is σ = 236125440. Its totient is φ = 70834176.

The previous prime is 131710499. The next prime is 131710511. The reversal of 131710509 is 905017131.

It is a happy number.

It is not a de Polignac number, because 131710509 - 2⁹ = 131709997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131710549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17284 + ... + 23709.

It is an arithmetic number, because the mean of its divisors is an integer number (7378920).

Almost surely, 2^131710509 is an apocalyptic number.

It is an amenable number.

131710509 is a deficient number, since it is larger than the sum of its proper divisors (104414931).

131710509 is a wasteful number, since it uses less digits than its factorization.

131710509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41026 (or 41020 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 131710509 is about 11476.5198993423. The cubic root of 131710509 is about 508.7918461113.

The spelling of 131710509 in words is "one hundred thirty-one million, seven hundred ten thousand, five hundred nine".