51727139 has 8 divisors (see below), whose sum is σ = 54517440. Its totient is φ = 48943656.

The previous prime is 51727111. The next prime is 51727157. The reversal of 51727139 is 93172715.

It is a happy number.

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 51727139 - 2²⁴ = 34949923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51727099 and 51727108.

It is not an unprimeable number, because it can be changed into a prime (51727339) 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, 23792 + ... + 25874.

It is an arithmetic number, because the mean of its divisors is an integer number (6814680).

Almost surely, 2^51727139 is an apocalyptic number.

51727139 is a deficient number, since it is larger than the sum of its proper divisors (2790301).

51727139 is a wasteful number, since it uses less digits than its factorization.

51727139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409.

The product of its digits is 13230, while the sum is 35.

The square root of 51727139 is about 7192.1581601074. The cubic root of 51727139 is about 372.5971135472.

The spelling of 51727139 in words is "fifty-one million, seven hundred twenty-seven thousand, one hundred thirty-nine".