2056147999 has 4 divisors (see below), whose sum is σ = 2069947800. Its totient is φ = 2042348200.

The previous prime is 2056147993. The next prime is 2056148021. The reversal of 2056147999 is 9997416502.

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

It is a cyclic number.

It is not a de Polignac number, because 2056147999 - 2⁹ = 2056147487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056147993) 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, 6899677 + ... + 6899974.

It is an arithmetic number, because the mean of its divisors is an integer number (517486950).

Almost surely, 2^2056147999 is an apocalyptic number.

2056147999 is a deficient number, since it is larger than the sum of its proper divisors (13799801).

2056147999 is a wasteful number, since it uses less digits than its factorization.

2056147999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13799800.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The square root of 2056147999 is about 45344.7681546615. The cubic root of 2056147999 is about 1271.6027461453.

The spelling of 2056147999 in words is "two billion, fifty-six million, one hundred forty-seven thousand, nine hundred ninety-nine".