51071711 has 4 divisors (see below), whose sum is σ = 51092424. Its totient is φ = 51051000.

The previous prime is 51071693. The next prime is 51071717. The reversal of 51071711 is 11717015.

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 51071711 - 2¹⁴ = 51055327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51071717) 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, 6065 + ... + 11786.

It is an arithmetic number, because the mean of its divisors is an integer number (12773106).

Almost surely, 2^51071711 is an apocalyptic number.

51071711 is a deficient number, since it is larger than the sum of its proper divisors (20713).

51071711 is a wasteful number, since it uses less digits than its factorization.

51071711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20712.

The product of its (nonzero) digits is 245, while the sum is 23.

The square root of 51071711 is about 7146.4474391127. The cubic root of 51071711 is about 371.0167093847.

Adding to 51071711 its reverse (11717015), we get a palindrome (62788726).

The spelling of 51071711 in words is "fifty-one million, seventy-one thousand, seven hundred eleven".