51368871 has 4 divisors (see below), whose sum is σ = 68491832. Its totient is φ = 34245912.

The previous prime is 51368869. The next prime is 51368879. The reversal of 51368871 is 17886315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51368871 - 2¹ = 51368869 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 (51368879) 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, 8561476 + ... + 8561481.

It is an arithmetic number, because the mean of its divisors is an integer number (17122958).

Almost surely, 2^51368871 is an apocalyptic number.

51368871 is a deficient number, since it is larger than the sum of its proper divisors (17122961).

51368871 is a wasteful number, since it uses less digits than its factorization.

51368871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17122960.

The product of its digits is 40320, while the sum is 39.

The square root of 51368871 is about 7167.2080338162. The cubic root of 51368871 is about 371.7349033374.

The spelling of 51368871 in words is "fifty-one million, three hundred sixty-eight thousand, eight hundred seventy-one".