2031321 has 4 divisors (see below), whose sum is σ = 2708432. Its totient is φ = 1354212.

The previous prime is 2031319. The next prime is 2031353. The reversal of 2031321 is 1231302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2031321 - 2¹ = 2031319 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2031297 and 2031306.

It is not an unprimeable number, because it can be changed into a prime (2031301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338551 + ... + 338556.

It is an arithmetic number, because the mean of its divisors is an integer number (677108).

2^2031321 is an apocalyptic number.

It is an amenable number.

2031321 is a deficient number, since it is larger than the sum of its proper divisors (677111).

2031321 is an equidigital number, since it uses as much as digits as its factorization.

2031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677110.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2031321 is about 1425.2441896040. The cubic root of 2031321 is about 126.6464010361.

Adding to 2031321 its reverse (1231302), we get a palindrome (3262623).

The spelling of 2031321 in words is "two million, thirty-one thousand, three hundred twenty-one".