51727321 has 8 divisors (see below), whose sum is σ = 52619840. Its totient is φ = 50842512.

The previous prime is 51727309. The next prime is 51727337. The reversal of 51727321 is 12372715.

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 51727321 - 2⁹ = 51726809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51727321.

It is not an unprimeable number, because it can be changed into a prime (51727301) 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, 12511 + ... + 16123.

It is an arithmetic number, because the mean of its divisors is an integer number (6577480).

Almost surely, 2^51727321 is an apocalyptic number.

It is an amenable number.

51727321 is a deficient number, since it is larger than the sum of its proper divisors (892519).

51727321 is a wasteful number, since it uses less digits than its factorization.

51727321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855.

The product of its digits is 2940, while the sum is 28.

The square root of 51727321 is about 7192.1708127658. The cubic root of 51727321 is about 372.5975505363.

The spelling of 51727321 in words is "fifty-one million, seven hundred twenty-seven thousand, three hundred twenty-one".