2051885387 has 4 divisors (see below), whose sum is σ = 2079993480. Its totient is φ = 2023777296.

The previous prime is 2051885383. The next prime is 2051885389. The reversal of 2051885387 is 7835881502.

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 2051885387 - 2² = 2051885383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051885383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14053937 + ... + 14054082.

It is an arithmetic number, because the mean of its divisors is an integer number (519998370).

Almost surely, 2^2051885387 is an apocalyptic number.

2051885387 is a deficient number, since it is larger than the sum of its proper divisors (28108093).

2051885387 is an equidigital number, since it uses as much as digits as its factorization.

2051885387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28108092.

The product of its (nonzero) digits is 537600, while the sum is 47.

The square root of 2051885387 is about 45297.7415220671. The cubic root of 2051885387 is about 1270.7234159447.

The spelling of 2051885387 in words is "two billion, fifty-one million, eight hundred eighty-five thousand, three hundred eighty-seven".