2100031 has 2 divisors, whose sum is σ = 2100032.
Its totient is φ = 2100030.
The previous prime is 2100011. The next prime is 2100041. The reversal of 2100031 is 1300012.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 2100031 - 211 = 2097983 is a prime.
It is a super-2 number, since 2×21000312 = 8820260401922, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 2099987 and 2100023.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2100001) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050015 + 1050016.
It is an arithmetic number, because the mean of its divisors is an integer number (1050016).
22100031 is an apocalyptic number.
2100031 is a deficient number, since it is larger than the sum of its proper divisors (1).
2100031 is an equidigital number, since it uses as much as digits as its factorization.
2100031 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 6, while the sum is 7.
The square root of 2100031 is about 1449.1483705956.
The cubic root of 2100031 is about 128.0585466219.
Adding to 2100031 its reverse (1300012), we get a palindrome (3400043).
The spelling of 2100031 in words is "two million, one hundred thousand, thirty-one".