51719974 has 4 divisors (see below), whose sum is σ = 77579964. Its totient is φ = 25859986.

The previous prime is 51719971. The next prime is 51719981. The reversal of 51719974 is 47991715.

51719974 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 an emirpimes, since its reverse is a distinct semiprime: 47991715 = 5 ⋅9598343.

It is a self number, because there is not a number n which added to its sum of digits gives 51719974.

It is a congruent 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 as a sum of consecutive naturals, namely, 12929992 + ... + 12929995.

It is an arithmetic number, because the mean of its divisors is an integer number (19394991).

Almost surely, 2^51719974 is an apocalyptic number.

51719974 is a deficient number, since it is larger than the sum of its proper divisors (25859990).

51719974 is a wasteful number, since it uses less digits than its factorization.

51719974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25859989.

The product of its digits is 79380, while the sum is 43.

The square root of 51719974 is about 7191.6600308969. The cubic root of 51719974 is about 372.5799092862.

The spelling of 51719974 in words is "fifty-one million, seven hundred nineteen thousand, nine hundred seventy-four".