2113511 has 2 divisors, whose sum is σ = 2113512. Its totient is φ = 2113510.

The previous prime is 2113471. The next prime is 2113513. The reversal of 2113511 is 1153112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113511 is a prime.

It is a Sophie Germain prime.

Together with 2113513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056755 + 1056756.

It is an arithmetic number, because the mean of its divisors is an integer number (1056756).

2^2113511 is an apocalyptic number.

2113511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113511 is an equidigital number, since it uses as much as digits as its factorization.

2113511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30, while the sum is 14.

The square root of 2113511 is about 1453.7919383461. The cubic root of 2113511 is about 128.3319630295.

Adding to 2113511 its reverse (1153112), we get a palindrome (3266623).

The spelling of 2113511 in words is "two million, one hundred thirteen thousand, five hundred eleven".