51318871 has 8 divisors (see below), whose sum is σ = 52216704. Its totient is φ = 50426040.

The previous prime is 51318859. The next prime is 51318881. The reversal of 51318871 is 17881315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51318871 - 2²³ = 42930263 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 (51318811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23596 + ... + 25678.

It is an arithmetic number, because the mean of its divisors is an integer number (6527088).

Almost surely, 2^51318871 is an apocalyptic number.

51318871 is a deficient number, since it is larger than the sum of its proper divisors (897833).

51318871 is a wasteful number, since it uses less digits than its factorization.

51318871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its digits is 6720, while the sum is 34.

The square root of 51318871 is about 7163.7190760107. The cubic root of 51318871 is about 371.6142545311.

The spelling of 51318871 in words is "fifty-one million, three hundred eighteen thousand, eight hundred seventy-one".