51368247 has 24 divisors (see below), whose sum is σ = 87094176. Its totient is φ = 28558656.

The previous prime is 51368243. The next prime is 51368279. The reversal of 51368247 is 74286315.

51368247 is a `hidden beast` number, since 51 + 368 + 247 = 666.

It is not a de Polignac number, because 51368247 - 2² = 51368243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51368243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8688 + ... + 13349.

It is an arithmetic number, because the mean of its divisors is an integer number (3628924).

Almost surely, 2^51368247 is an apocalyptic number.

51368247 is a deficient number, since it is larger than the sum of its proper divisors (35725929).

51368247 is a wasteful number, since it uses less digits than its factorization.

51368247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22087 (or 22084 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51368247 is about 7167.1645020887. The cubic root of 51368247 is about 371.7333981229.

It can be divided in two parts, 51368 and 247, that added together give a palindrome (51615).

The spelling of 51368247 in words is "fifty-one million, three hundred sixty-eight thousand, two hundred forty-seven".