2051865711 has 24 divisors (see below), whose sum is σ = 3586456224. Its totient is φ = 1103523840.

The previous prime is 2051865709. The next prime is 2051865713. The reversal of 2051865711 is 1175681502.

2051865711 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 86 + 571 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2051865709) and next prime (2051865713).

It is not a de Polignac number, because 2051865711 - 2¹ = 2051865709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051865713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 956850 + ... + 958991.

It is an arithmetic number, because the mean of its divisors is an integer number (149435676).

Almost surely, 2^2051865711 is an apocalyptic number.

2051865711 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2051865711 is a deficient number, since it is larger than the sum of its proper divisors (1534590513).

2051865711 is a wasteful number, since it uses less digits than its factorization.

2051865711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915871 (or 1915868 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The square root of 2051865711 is about 45297.5243363255. The cubic root of 2051865711 is about 1270.7193541789.

The spelling of 2051865711 in words is "two billion, fifty-one million, eight hundred sixty-five thousand, seven hundred eleven".