2113513 has 2 divisors, whose sum is σ = 2113514. Its totient is φ = 2113512.

The previous prime is 2113511. The next prime is 2113523. The reversal of 2113513 is 3153112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2111209 + 2304 = 1453^2 + 48^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113513 - 2¹ = 2113511 is a prime.

Together with 2113511, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (2113511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056756 + 1056757.

It is an arithmetic number, because the mean of its divisors is an integer number (1056757).

2^2113513 is an apocalyptic number.

It is an amenable number.

2113513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113513 is an equidigital number, since it uses as much as digits as its factorization.

2113513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 16.

The square root of 2113513 is about 1453.7926262022. The cubic root of 2113513 is about 128.3320035094.

Adding to 2113513 its reverse (3153112), we get a palindrome (5266625).

The spelling of 2113513 in words is "two million, one hundred thirteen thousand, five hundred thirteen".