2100513 has 4 divisors (see below), whose sum is σ = 2800688. Its totient is φ = 1400340.

The previous prime is 2100493. The next prime is 2100523. The reversal of 2100513 is 3150012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2100513 - 2⁸ = 2100257 is a prime.

It is a D-number.

It is a Duffinian number.

2100513 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2100523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350083 + ... + 350088.

It is an arithmetic number, because the mean of its divisors is an integer number (700172).

2^2100513 is an apocalyptic number.

It is an amenable number.

2100513 is a deficient number, since it is larger than the sum of its proper divisors (700175).

2100513 is an equidigital number, since it uses as much as digits as its factorization.

2100513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700174.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 2100513 is about 1449.3146656265. The cubic root of 2100513 is about 128.0683432230.

Adding to 2100513 its reverse (3150012), we get a palindrome (5250525).

The spelling of 2100513 in words is "two million, one hundred thousand, five hundred thirteen".