51347751 has 32 divisors (see below), whose sum is σ = 84983808. Its totient is φ = 26853120.

The previous prime is 51347731. The next prime is 51347773. The reversal of 51347751 is 15774315.

It is not a de Polignac number, because 51347751 - 2⁷ = 51347623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51347711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33931 + ... + 35411.

It is an arithmetic number, because the mean of its divisors is an integer number (2655744).

Almost surely, 2^51347751 is an apocalyptic number.

51347751 is a deficient number, since it is larger than the sum of its proper divisors (33636057).

51347751 is a wasteful number, since it uses less digits than its factorization.

51347751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631.

The product of its digits is 14700, while the sum is 33.

The square root of 51347751 is about 7165.7345052688. The cubic root of 51347751 is about 371.6839508363.

The spelling of 51347751 in words is "fifty-one million, three hundred forty-seven thousand, seven hundred fifty-one".