12851831 has 2 divisors, whose sum is σ = 12851832. Its totient is φ = 12851830.

The previous prime is 12851791. The next prime is 12851837. The reversal of 12851831 is 13815821.

12851831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13815821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12851831 - 2⁶ = 12851767 is a prime.

It is a super-2 number, since 2×12851831² = 330339120105122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12851794 and 12851803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12851837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6425915 + 6425916.

It is an arithmetic number, because the mean of its divisors is an integer number (6425916).

Almost surely, 2^12851831 is an apocalyptic number.

12851831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12851831 is an equidigital number, since it uses as much as digits as its factorization.

12851831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 29.

The square root of 12851831 is about 3584.9450483934. The cubic root of 12851831 is about 234.2367329298.

The spelling of 12851831 in words is "twelve million, eight hundred fifty-one thousand, eight hundred thirty-one".