51118771 has 8 divisors (see below), whose sum is σ = 56142000. Its totient is φ = 46158240.

The previous prime is 51118763. The next prime is 51118777. The reversal of 51118771 is 17781115.

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

It is a cyclic number.

It is not a de Polignac number, because 51118771 - 2³ = 51118763 is a prime.

It is a super-2 number, since 2×51118771² = 5226257497100882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51118777) 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, 13956 + ... + 17233.

It is an arithmetic number, because the mean of its divisors is an integer number (7017750).

Almost surely, 2^51118771 is an apocalyptic number.

51118771 is a deficient number, since it is larger than the sum of its proper divisors (5023229).

51118771 is a wasteful number, since it uses less digits than its factorization.

51118771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31349.

The product of its digits is 1960, while the sum is 31.

The square root of 51118771 is about 7149.7392260138. The cubic root of 51118771 is about 371.1306321147.

Adding to 51118771 its reverse (17781115), we get a palindrome (68899886).

The spelling of 51118771 in words is "fifty-one million, one hundred eighteen thousand, seven hundred seventy-one".