51376539 has 4 divisors (see below), whose sum is σ = 68502056. Its totient is φ = 34251024.

The previous prime is 51376537. The next prime is 51376543. The reversal of 51376539 is 93567315.

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

It is not a de Polignac number, because 51376539 - 2¹ = 51376537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51376497 and 51376506.

It is not an unprimeable number, because it can be changed into a prime (51376531) 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, 8562754 + ... + 8562759.

It is an arithmetic number, because the mean of its divisors is an integer number (17125514).

Almost surely, 2^51376539 is an apocalyptic number.

51376539 is a deficient number, since it is larger than the sum of its proper divisors (17125517).

51376539 is a wasteful number, since it uses less digits than its factorization.

51376539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17125516.

The product of its digits is 85050, while the sum is 39.

The square root of 51376539 is about 7167.7429501901. The cubic root of 51376539 is about 371.7533991136.

It can be divided in two parts, 51376 and 539, that added together give a palindrome (51915).

The spelling of 51376539 in words is "fifty-one million, three hundred seventy-six thousand, five hundred thirty-nine".