2123031 has 4 divisors (see below), whose sum is σ = 2830712. Its totient is φ = 1415352.

The previous prime is 2123027. The next prime is 2123047. The reversal of 2123031 is 1303212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2123031 - 2² = 2123027 is a prime.

It is a super-2 number, since 2×2123031² = 9014521253922, which contains 22 as substring.

It is an Ulam number.

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 = 2122998 and 2123016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123081) 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, 353836 + ... + 353841.

It is an arithmetic number, because the mean of its divisors is an integer number (707678).

2^2123031 is an apocalyptic number.

2123031 is a deficient number, since it is larger than the sum of its proper divisors (707681).

2123031 is an equidigital number, since it uses as much as digits as its factorization.

2123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707680.

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

The square root of 2123031 is about 1457.0624557650. The cubic root of 2123031 is about 128.5243586075.

Adding to 2123031 its reverse (1303212), we get a palindrome (3426243).

The spelling of 2123031 in words is "two million, one hundred twenty-three thousand, thirty-one".