2051385857 has 8 divisors (see below), whose sum is σ = 2111396736. Its totient is φ = 1991615472.

The previous prime is 2051385799. The next prime is 2051385899. The reversal of 2051385857 is 7585831502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2051385857 - 2⁶ = 2051385793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051385757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42743 + ... + 77004.

It is an arithmetic number, because the mean of its divisors is an integer number (263924592).

Almost surely, 2^2051385857 is an apocalyptic number.

It is an amenable number.

2051385857 is a deficient number, since it is larger than the sum of its proper divisors (60010879).

2051385857 is a wasteful number, since it uses less digits than its factorization.

2051385857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120247.

The product of its (nonzero) digits is 336000, while the sum is 44.

The square root of 2051385857 is about 45292.2273353828. The cubic root of 2051385857 is about 1270.6202886794.

The spelling of 2051385857 in words is "two billion, fifty-one million, three hundred eighty-five thousand, eight hundred fifty-seven".