51861727 has 8 divisors (see below), whose sum is σ = 53111232. Its totient is φ = 50618400.

The previous prime is 51861673. The next prime is 51861739. The reversal of 51861727 is 72716815.

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 51861727 - 2²³ = 43473119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54861727) 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, 18477 + ... + 21097.

It is an arithmetic number, because the mean of its divisors is an integer number (6638904).

Almost surely, 2^51861727 is an apocalyptic number.

51861727 is a deficient number, since it is larger than the sum of its proper divisors (1249505).

51861727 is a wasteful number, since it uses less digits than its factorization.

51861727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089.

The product of its digits is 23520, while the sum is 37.

The square root of 51861727 is about 7201.5086613848. The cubic root of 51861727 is about 372.9199851367.

The spelling of 51861727 in words is "fifty-one million, eight hundred sixty-one thousand, seven hundred twenty-seven".