2105164457 has 4 divisors (see below), whose sum is σ = 2296543056. Its totient is φ = 1913785860.

The previous prime is 2105164423. The next prime is 2105164471. The reversal of 2105164457 is 7544615012.

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 2105164457 - 2²⁴ = 2088387241 is a prime.

It is a super-2 number, since 2×2105164457² = 8863434782032209698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105164157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95689283 + ... + 95689304.

It is an arithmetic number, because the mean of its divisors is an integer number (574135764).

Almost surely, 2^2105164457 is an apocalyptic number.

It is an amenable number.

2105164457 is a deficient number, since it is larger than the sum of its proper divisors (191378599).

2105164457 is a wasteful number, since it uses less digits than its factorization.

2105164457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191378598.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 2105164457 is about 45882.0711934411. The cubic root of 2105164457 is about 1281.6280668892.

Adding to 2105164457 its reverse (7544615012), we get a palindrome (9649779469).

The spelling of 2105164457 in words is "two billion, one hundred five million, one hundred sixty-four thousand, four hundred fifty-seven".