51719013 has 16 divisors (see below), whose sum is σ = 76731840. Its totient is φ = 34429392.

The previous prime is 51719011. The next prime is 51719021. The reversal of 51719013 is 31091715.

It is a happy number.

51719013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51719013 - 2¹ = 51719011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51719011) 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 15 ways as a sum of consecutive naturals, for example, 33895 + ... + 35387.

It is an arithmetic number, because the mean of its divisors is an integer number (4795740).

Almost surely, 2^51719013 is an apocalyptic number.

It is an amenable number.

51719013 is a deficient number, since it is larger than the sum of its proper divisors (25012827).

51719013 is a wasteful number, since it uses less digits than its factorization.

51719013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 51719013 is about 7191.5932170834. The cubic root of 51719013 is about 372.5776016574.

The spelling of 51719013 in words is "fifty-one million, seven hundred nineteen thousand, thirteen".