51971727 has 8 divisors (see below), whose sum is σ = 70010416. Its totient is φ = 34290432.

The previous prime is 51971713. The next prime is 51971729. The reversal of 51971727 is 72717915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51971727 - 2⁶ = 51971663 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 (51971729) 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, 89008 + ... + 89589.

It is an arithmetic number, because the mean of its divisors is an integer number (8751302).

Almost surely, 2^51971727 is an apocalyptic number.

51971727 is a deficient number, since it is larger than the sum of its proper divisors (18038689).

51971727 is a wasteful number, since it uses less digits than its factorization.

51971727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178697.

The product of its digits is 30870, while the sum is 39.

The square root of 51971727 is about 7209.1419045542. The cubic root of 51971727 is about 373.1834564384.

The spelling of 51971727 in words is "fifty-one million, nine hundred seventy-one thousand, seven hundred twenty-seven".