2118031 has 2 divisors, whose sum is σ = 2118032. Its totient is φ = 2118030.

The previous prime is 2118029. The next prime is 2118037. The reversal of 2118031 is 1308112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2118031 - 2¹ = 2118029 is a prime.

It is a super-2 number, since 2×2118031² = 8972110633922, which contains 22 as substring.

Together with 2118029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2117996 and 2118014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059015 + 1059016.

It is an arithmetic number, because the mean of its divisors is an integer number (1059016).

2^2118031 is an apocalyptic number.

2118031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118031 is an equidigital number, since it uses as much as digits as its factorization.

2118031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2118031 is about 1455.3456634078. The cubic root of 2118031 is about 128.4233823871.

The spelling of 2118031 in words is "two million, one hundred eighteen thousand, thirty-one".