12312151 has 4 divisors (see below), whose sum is σ = 12319704. Its totient is φ = 12304600.

The previous prime is 12312149. The next prime is 12312173. The reversal of 12312151 is 15121321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12312151 - 2¹ = 12312149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312101) 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 in 3 ways as a sum of consecutive naturals, for example, 205 + ... + 4966.

It is an arithmetic number, because the mean of its divisors is an integer number (3079926).

Almost surely, 2^12312151 is an apocalyptic number.

12312151 is a deficient number, since it is larger than the sum of its proper divisors (7553).

12312151 is an equidigital number, since it uses as much as digits as its factorization.

12312151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552.

The product of its digits is 60, while the sum is 16.

The square root of 12312151 is about 3508.8674811112. The cubic root of 12312151 is about 230.9110118683.

Adding to 12312151 its reverse (15121321), we get a palindrome (27433472).

The spelling of 12312151 in words is "twelve million, three hundred twelve thousand, one hundred fifty-one".