2106631 has 2 divisors, whose sum is σ = 2106632. Its totient is φ = 2106630.

The previous prime is 2106619. The next prime is 2106653. The reversal of 2106631 is 1366012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2106631 - 2²¹ = 9479 is a prime.

It is a super-2 number, since 2×2106631² = 8875788340322, which contains 22 as substring.

It is a Chen prime.

2106631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2106599 and 2106608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2106431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053315 + 1053316.

It is an arithmetic number, because the mean of its divisors is an integer number (1053316).

2^2106631 is an apocalyptic number.

2106631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106631 is an equidigital number, since it uses as much as digits as its factorization.

2106631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2106631 is about 1451.4237837379. The cubic root of 2106631 is about 128.1925609182.

The spelling of 2106631 in words is "two million, one hundred six thousand, six hundred thirty-one".