51648271 has 4 divisors (see below), whose sum is σ = 53893872. Its totient is φ = 49402672.

The previous prime is 51648241. The next prime is 51648299. The reversal of 51648271 is 17284615.

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

It is a cyclic number.

It is not a de Polignac number, because 51648271 - 2⁵ = 51648239 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 (51648211) 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, 1122766 + ... + 1122811.

It is an arithmetic number, because the mean of its divisors is an integer number (13473468).

Almost surely, 2^51648271 is an apocalyptic number.

51648271 is a deficient number, since it is larger than the sum of its proper divisors (2245601).

51648271 is a wasteful number, since it uses less digits than its factorization.

51648271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245600.

The product of its digits is 13440, while the sum is 34.

The square root of 51648271 is about 7186.6731524399. The cubic root of 51648271 is about 372.4076518368.

The spelling of 51648271 in words is "fifty-one million, six hundred forty-eight thousand, two hundred seventy-one".