131705265 has 16 divisors (see below), whose sum is σ = 214705728. Its totient is φ = 68917056.

The previous prime is 131705257. The next prime is 131705279. The reversal of 131705265 is 562507131.

It is not a de Polignac number, because 131705265 - 2³ = 131705257 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82039 + ... + 83628.

It is an arithmetic number, because the mean of its divisors is an integer number (13419108).

Almost surely, 2^131705265 is an apocalyptic number.

131705265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131705265 is a deficient number, since it is larger than the sum of its proper divisors (83000463).

131705265 is a wasteful number, since it uses less digits than its factorization.

131705265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165728.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 131705265 is about 11476.2914305973. The cubic root of 131705265 is about 508.7850935753.

The spelling of 131705265 in words is "one hundred thirty-one million, seven hundred five thousand, two hundred sixty-five".