2107531 has 2 divisors, whose sum is σ = 2107532. Its totient is φ = 2107530.

The previous prime is 2107529. The next prime is 2107543. The reversal of 2107531 is 1357012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2107531 - 2¹ = 2107529 is a prime.

It is a super-2 number, since 2×2107531² = 8883373831922, which contains 22 as substring.

Together with 2107529, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2107499 and 2107508.

It is not a weakly prime, because it can be changed into another prime (2101531) 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, 1053765 + 1053766.

It is an arithmetic number, because the mean of its divisors is an integer number (1053766).

2^2107531 is an apocalyptic number.

2107531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2107531 is an equidigital number, since it uses as much as digits as its factorization.

2107531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 2107531 is about 1451.7337910237. The cubic root of 2107531 is about 128.2108138979.

The spelling of 2107531 in words is "two million, one hundred seven thousand, five hundred thirty-one".