51775471087 has 4 divisors (see below), whose sum is σ = 52085504016. Its totient is φ = 51465438160.

The previous prime is 51775471073. The next prime is 51775471091. The reversal of 51775471087 is 78017457715.

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 51775471087 - 2¹⁹ = 51774946799 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 (51775471387) 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, 155016214 + ... + 155016547.

It is an arithmetic number, because the mean of its divisors is an integer number (13021376004).

Almost surely, 2^51775471087 is an apocalyptic number.

51775471087 is a deficient number, since it is larger than the sum of its proper divisors (310032929).

51775471087 is a wasteful number, since it uses less digits than its factorization.

51775471087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310032928.

The product of its (nonzero) digits is 1920800, while the sum is 52.

The spelling of 51775471087 in words is "fifty-one billion, seven hundred seventy-five million, four hundred seventy-one thousand, eighty-seven".