2105257313 has 4 divisors (see below), whose sum is σ = 2105464368. Its totient is φ = 2105050260.

The previous prime is 2105257309. The next prime is 2105257331. The reversal of 2105257313 is 3137525012.

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 a cyclic number.

It is not a de Polignac number, because 2105257313 - 2² = 2105257309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105257393) 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, 87443 + ... + 108888.

It is an arithmetic number, because the mean of its divisors is an integer number (526366092).

Almost surely, 2^2105257313 is an apocalyptic number.

It is an amenable number.

2105257313 is a deficient number, since it is larger than the sum of its proper divisors (207055).

2105257313 is a wasteful number, since it uses less digits than its factorization.

2105257313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207054.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 2105257313 is about 45883.0830808044. The cubic root of 2105257313 is about 1281.6469102478.

The spelling of 2105257313 in words is "two billion, one hundred five million, two hundred fifty-seven thousand, three hundred thirteen".