12331157 has 2 divisors, whose sum is σ = 12331158. Its totient is φ = 12331156.

The previous prime is 12331147. The next prime is 12331181. The reversal of 12331157 is 75113321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10297681 + 2033476 = 3209^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331157 - 2⁴ = 12331141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12331127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165578 + 6165579.

It is an arithmetic number, because the mean of its divisors is an integer number (6165579).

Almost surely, 2^12331157 is an apocalyptic number.

It is an amenable number.

12331157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331157 is an equidigital number, since it uses as much as digits as its factorization.

12331157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 23.

The square root of 12331157 is about 3511.5747179862. The cubic root of 12331157 is about 231.0297682194.

Adding to 12331157 its reverse (75113321), we get a palindrome (87444478).

The spelling of 12331157 in words is "twelve million, three hundred thirty-one thousand, one hundred fifty-seven".