51331227 has 4 divisors (see below), whose sum is σ = 68441640. Its totient is φ = 34220816.

The previous prime is 51331223. The next prime is 51331229. The reversal of 51331227 is 72213315.

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 51331227 - 2² = 51331223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51331197 and 51331206.

It is not an unprimeable number, because it can be changed into a prime (51331223) 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, 8555202 + ... + 8555207.

It is an arithmetic number, because the mean of its divisors is an integer number (17110410).

Almost surely, 2^51331227 is an apocalyptic number.

51331227 is a deficient number, since it is larger than the sum of its proper divisors (17110413).

51331227 is a wasteful number, since it uses less digits than its factorization.

51331227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17110412.

The product of its digits is 1260, while the sum is 24.

The square root of 51331227 is about 7164.5814253172. The cubic root of 51331227 is about 371.6440765516.

The spelling of 51331227 in words is "fifty-one million, three hundred thirty-one thousand, two hundred twenty-seven".