2056512197 has 4 divisors (see below), whose sum is σ = 2056678476. Its totient is φ = 2056345920.

The previous prime is 2056512187. The next prime is 2056512203. The reversal of 2056512197 is 7912156502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1741059076 + 315453121 = 41726^2 + 17761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2056512197 - 2⁴ = 2056512181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2056512197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056512187) 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, 62954 + ... + 89867.

It is an arithmetic number, because the mean of its divisors is an integer number (514169619).

Almost surely, 2^2056512197 is an apocalyptic number.

It is an amenable number.

2056512197 is a deficient number, since it is larger than the sum of its proper divisors (166279).

2056512197 is a wasteful number, since it uses less digits than its factorization.

2056512197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166278.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 2056512197 is about 45348.7838535941. The cubic root of 2056512197 is about 1271.6778198327.

Adding to 2056512197 its reverse (7912156502), we get a palindrome (9968668699).

The spelling of 2056512197 in words is "two billion, fifty-six million, five hundred twelve thousand, one hundred ninety-seven".