2051378017 has 8 divisors (see below), whose sum is σ = 2285355240. Its totient is φ = 1828283520.

The previous prime is 2051377987. The next prime is 2051378033. The reversal of 2051378017 is 7108731502.

It can be written as a sum of positive squares in 4 ways, for example, as 363893776 + 1687484241 = 19076^2 + 41079^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051378017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051378047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720284 + ... + 2721037.

It is an arithmetic number, because the mean of its divisors is an integer number (285669405).

Almost surely, 2^2051378017 is an apocalyptic number.

It is an amenable number.

2051378017 is a deficient number, since it is larger than the sum of its proper divisors (233977223).

2051378017 is a wasteful number, since it uses less digits than its factorization.

2051378017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5441363.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 2051378017 is about 45292.1407862335. The cubic root of 2051378017 is about 1270.6186699890.

The spelling of 2051378017 in words is "two billion, fifty-one million, three hundred seventy-eight thousand, seventeen".