131224135157 has 2 divisors, whose sum is σ = 131224135158. Its totient is φ = 131224135156.

The previous prime is 131224135111. The next prime is 131224135223. The reversal of 131224135157 is 751531422131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77848812196 + 53375322961 = 279014^2 + 231031^2 .

It is a cyclic number.

It is not a de Polignac number, because 131224135157 - 2¹⁰ = 131224134133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131224035157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65612067578 + 65612067579.

It is an arithmetic number, because the mean of its divisors is an integer number (65612067579).

Almost surely, 2^131224135157 is an apocalyptic number.

It is an amenable number.

131224135157 is a deficient number, since it is larger than the sum of its proper divisors (1).

131224135157 is an equidigital number, since it uses as much as digits as its factorization.

131224135157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

Adding to 131224135157 its reverse (751531422131), we get a palindrome (882755557288).

The spelling of 131224135157 in words is "one hundred thirty-one billion, two hundred twenty-four million, one hundred thirty-five thousand, one hundred fifty-seven".