51712787 has 6 divisors (see below), whose sum is σ = 60155748. Its totient is φ = 44325204.

The previous prime is 51712783. The next prime is 51712799. The reversal of 51712787 is 78721715.

It is not a de Polignac number, because 51712787 - 2² = 51712783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51712787.

It is not an unprimeable number, because it can be changed into a prime (51712783) 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 5 ways as a sum of consecutive naturals, for example, 527633 + ... + 527730.

It is an arithmetic number, because the mean of its divisors is an integer number (10025958).

Almost surely, 2^51712787 is an apocalyptic number.

51712787 is a deficient number, since it is larger than the sum of its proper divisors (8442961).

51712787 is a wasteful number, since it uses less digits than its factorization.

51712787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055377 (or 1055370 counting only the distinct ones).

The product of its digits is 27440, while the sum is 38.

The square root of 51712787 is about 7191.1603375255. The cubic root of 51712787 is about 372.5626506036.

The spelling of 51712787 in words is "fifty-one million, seven hundred twelve thousand, seven hundred eighty-seven".