131755517 has 2 divisors, whose sum is σ = 131755518. Its totient is φ = 131755516.

The previous prime is 131755501. The next prime is 131755537. The reversal of 131755517 is 715557131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119880601 + 11874916 = 10949^2 + 3446^2 .

It is an emirp because it is prime and its reverse (715557131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131755517 - 2⁴ = 131755501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131755537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65877758 + 65877759.

It is an arithmetic number, because the mean of its divisors is an integer number (65877759).

Almost surely, 2^131755517 is an apocalyptic number.

It is an amenable number.

131755517 is a deficient number, since it is larger than the sum of its proper divisors (1).

131755517 is an equidigital number, since it uses as much as digits as its factorization.

131755517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18375, while the sum is 35.

The square root of 131755517 is about 11478.4806050278. The cubic root of 131755517 is about 508.8497941461.

The spelling of 131755517 in words is "one hundred thirty-one million, seven hundred fifty-five thousand, five hundred seventeen".