51447927 has 8 divisors (see below), whose sum is σ = 69304816. Its totient is φ = 33944832.

The previous prime is 51447923. The next prime is 51447947. The reversal of 51447927 is 72974415.

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

It is not a de Polignac number, because 51447927 - 2² = 51447923 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 (51447923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88108 + ... + 88689.

It is an arithmetic number, because the mean of its divisors is an integer number (8663102).

Almost surely, 2^51447927 is an apocalyptic number.

51447927 is a deficient number, since it is larger than the sum of its proper divisors (17856889).

51447927 is a wasteful number, since it uses less digits than its factorization.

51447927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176897.

The product of its digits is 70560, while the sum is 39.

The square root of 51447927 is about 7172.7210317982. The cubic root of 51447927 is about 371.9255039287.

The spelling of 51447927 in words is "fifty-one million, four hundred forty-seven thousand, nine hundred twenty-seven".