2051872105 has 8 divisors (see below), whose sum is σ = 2462553864. Its totient is φ = 1641292800.

The previous prime is 2051872099. The next prime is 2051872117. The reversal of 2051872105 is 5012781502.

It can be written as a sum of positive squares in 4 ways, for example, as 19395216 + 2032476889 = 4404^2 + 45083^2 .

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

It is not a de Polignac number, because 2051872105 - 2¹⁹ = 2051347817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29065 + ... + 70345.

It is an arithmetic number, because the mean of its divisors is an integer number (307819233).

Almost surely, 2^2051872105 is an apocalyptic number.

It is an amenable number.

2051872105 is a deficient number, since it is larger than the sum of its proper divisors (410681759).

2051872105 is an equidigital number, since it uses as much as digits as its factorization.

2051872105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51227.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 2051872105 is about 45297.5949140790. The cubic root of 2051872105 is about 1270.7206741111.

The spelling of 2051872105 in words is "two billion, fifty-one million, eight hundred seventy-two thousand, one hundred five".