12321831 has 8 divisors (see below), whose sum is σ = 16534384. Its totient is φ = 8161920.

The previous prime is 12321797. The next prime is 12321847. The reversal of 12321831 is 13812321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12321831 - 2⁹ = 12321319 is a prime.

It is a super-2 number, since 2×12321831² = 303655038385122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321798 and 12321807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12610 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (2066798).

Almost surely, 2^12321831 is an apocalyptic number.

12321831 is a deficient number, since it is larger than the sum of its proper divisors (4212553).

12321831 is a wasteful number, since it uses less digits than its factorization.

12321831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26321.

The product of its digits is 288, while the sum is 21.

The square root of 12321831 is about 3510.2465725359. The cubic root of 12321831 is about 230.9715112634.

The spelling of 12321831 in words is "twelve million, three hundred twenty-one thousand, eight hundred thirty-one".