131229247 has 2 divisors, whose sum is σ = 131229248. Its totient is φ = 131229246.

The previous prime is 131229209. The next prime is 131229251. The reversal of 131229247 is 742922131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131229247 - 2¹⁵ = 131196479 is a prime.

It is a super-2 number, since 2×131229247² = 34442230536374018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131229547) 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, 65614623 + 65614624.

It is an arithmetic number, because the mean of its divisors is an integer number (65614624).

Almost surely, 2^131229247 is an apocalyptic number.

131229247 is a deficient number, since it is larger than the sum of its proper divisors (1).

131229247 is an equidigital number, since it uses as much as digits as its factorization.

131229247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 131229247 is about 11455.5334664083. The cubic root of 131229247 is about 508.1713918862.

The spelling of 131229247 in words is "one hundred thirty-one million, two hundred twenty-nine thousand, two hundred forty-seven".