2051601859 has 4 divisors (see below), whose sum is σ = 2052103104. Its totient is φ = 2051100616.

The previous prime is 2051601833. The next prime is 2051601869. The reversal of 2051601859 is 9581061502.

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 2051601859 - 2⁹ = 2051601347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051601809) 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, 244432 + ... + 252685.

It is an arithmetic number, because the mean of its divisors is an integer number (513025776).

Almost surely, 2^2051601859 is an apocalyptic number.

2051601859 is a deficient number, since it is larger than the sum of its proper divisors (501245).

2051601859 is an equidigital number, since it uses as much as digits as its factorization.

2051601859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501244.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 2051601859 is about 45294.6118097948. The cubic root of 2051601859 is about 1270.6648840425.

The spelling of 2051601859 in words is "two billion, fifty-one million, six hundred one thousand, eight hundred fifty-nine".