51020719 has 4 divisors (see below), whose sum is σ = 53706040. Its totient is φ = 48335400.

The previous prime is 51020677. The next prime is 51020731. The reversal of 51020719 is 91702015.

51020719 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.

It is a cyclic number.

It is not a de Polignac number, because 51020719 - 2⁷ = 51020591 is a prime.

It is a super-2 number, since 2×51020719² = 5206227534553922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51020693 and 51020702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51020779) 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, 1342632 + ... + 1342669.

It is an arithmetic number, because the mean of its divisors is an integer number (13426510).

Almost surely, 2^51020719 is an apocalyptic number.

51020719 is a deficient number, since it is larger than the sum of its proper divisors (2685321).

51020719 is a wasteful number, since it uses less digits than its factorization.

51020719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685320.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 51020719 is about 7142.8789013954. The cubic root of 51020719 is about 370.8931890533.

The spelling of 51020719 in words is "fifty-one million, twenty thousand, seven hundred nineteen".