51715827 has 10 divisors (see below), whose sum is σ = 77254628. Its totient is φ = 34477164.

The previous prime is 51715823. The next prime is 51715831. The reversal of 51715827 is 72851715.

51715827 is a `hidden beast` number, since 5 + 1 + 71 + 582 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (51715823) and next prime (51715831).

It is not a de Polignac number, because 51715827 - 2² = 51715823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51715791 and 51715800.

It is not an unprimeable number, because it can be changed into a prime (51715823) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 319153 + ... + 319314.

Almost surely, 2^51715827 is an apocalyptic number.

51715827 is a deficient number, since it is larger than the sum of its proper divisors (25538801).

51715827 is an equidigital number, since it uses as much as digits as its factorization.

51715827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638479 (or 638470 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 51715827 is about 7191.3717050365. The cubic root of 51715827 is about 372.5699509790.

The spelling of 51715827 in words is "fifty-one million, seven hundred fifteen thousand, eight hundred twenty-seven".