51719977 has 4 divisors (see below), whose sum is σ = 51738880. Its totient is φ = 51701076.

The previous prime is 51719971. The next prime is 51719981. The reversal of 51719977 is 77991715.

51719977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51719977 - 2⁷ = 51719849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51719971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4473 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (12934720).

Almost surely, 2^51719977 is an apocalyptic number.

It is an amenable number.

51719977 is a deficient number, since it is larger than the sum of its proper divisors (18903).

51719977 is a wasteful number, since it uses less digits than its factorization.

51719977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18902.

The product of its digits is 138915, while the sum is 46.

The square root of 51719977 is about 7191.6602394718. The cubic root of 51719977 is about 372.5799164900.

The spelling of 51719977 in words is "fifty-one million, seven hundred nineteen thousand, nine hundred seventy-seven".