51381771 has 16 divisors (see below), whose sum is σ = 78739200. Its totient is φ = 29194848.

The previous prime is 51381749. The next prime is 51381797. The reversal of 51381771 is 17718315.

It is not a de Polignac number, because 51381771 - 2⁵ = 51381739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51381371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3076 + ... + 10593.

It is an arithmetic number, because the mean of its divisors is an integer number (4921200).

Almost surely, 2^51381771 is an apocalyptic number.

51381771 is a deficient number, since it is larger than the sum of its proper divisors (27357429).

51381771 is a wasteful number, since it uses less digits than its factorization.

51381771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13858.

The product of its digits is 5880, while the sum is 33.

The square root of 51381771 is about 7168.1079093440. The cubic root of 51381771 is about 371.7660180236.

The spelling of 51381771 in words is "fifty-one million, three hundred eighty-one thousand, seven hundred seventy-one".