12311951 has 2 divisors, whose sum is σ = 12311952. Its totient is φ = 12311950.

The previous prime is 12311939. The next prime is 12311977. The reversal of 12311951 is 15911321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12311951 - 2¹⁰ = 12310927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311911) 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, 6155975 + 6155976.

It is an arithmetic number, because the mean of its divisors is an integer number (6155976).

Almost surely, 2^12311951 is an apocalyptic number.

12311951 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311951 is an equidigital number, since it uses as much as digits as its factorization.

12311951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 23.

The square root of 12311951 is about 3508.8389817716. The cubic root of 12311951 is about 230.9097615465.

The spelling of 12311951 in words is "twelve million, three hundred eleven thousand, nine hundred fifty-one".