131797231 has 2 divisors, whose sum is σ = 131797232. Its totient is φ = 131797230.

The previous prime is 131797217. The next prime is 131797301. The reversal of 131797231 is 132797131.

It is a weak prime.

It is an emirp because it is prime and its reverse (132797131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131797231 - 2¹⁵ = 131764463 is a prime.

It is a super-2 number, since 2×131797231² = 34741020198534722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131797031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65898615 + 65898616.

It is an arithmetic number, because the mean of its divisors is an integer number (65898616).

Almost surely, 2^131797231 is an apocalyptic number.

131797231 is a deficient number, since it is larger than the sum of its proper divisors (1).

131797231 is an equidigital number, since it uses as much as digits as its factorization.

131797231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938, while the sum is 34.

The square root of 131797231 is about 11480.2975135664. The cubic root of 131797231 is about 508.9034893566.

The spelling of 131797231 in words is "one hundred thirty-one million, seven hundred ninety-seven thousand, two hundred thirty-one".