12051831 has 16 divisors (see below), whose sum is σ = 17820288. Its totient is φ = 7183200.

The previous prime is 12051811. The next prime is 12051841. The reversal of 12051831 is 13815021.

It is not a de Polignac number, because 12051831 - 2¹¹ = 12049783 is a prime.

It is a super-2 number, since 2×12051831² = 290493260905122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12051798 and 12051807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12051811) 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 15 ways as a sum of consecutive naturals, for example, 981 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (1113768).

Almost surely, 2^12051831 is an apocalyptic number.

12051831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12051831 is a deficient number, since it is larger than the sum of its proper divisors (5768457).

12051831 is a wasteful number, since it uses less digits than its factorization.

12051831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6062.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 12051831 is about 3471.5747147368. The cubic root of 12051831 is about 229.2719955412.

Adding to 12051831 its reverse (13815021), we get a palindrome (25866852).

The spelling of 12051831 in words is "twelve million, fifty-one thousand, eight hundred thirty-one".