51798719 has 4 divisors (see below), whose sum is σ = 59198544. Its totient is φ = 44398896.

The previous prime is 51798713. The next prime is 51798749. The reversal of 51798719 is 91789715.

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 51798719 - 2¹² = 51794623 is a prime.

It is a super-2 number, since 2×51798719² = 5366214580081922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51798713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3699902 + ... + 3699915.

It is an arithmetic number, because the mean of its divisors is an integer number (14799636).

Almost surely, 2^51798719 is an apocalyptic number.

51798719 is a deficient number, since it is larger than the sum of its proper divisors (7399825).

51798719 is an equidigital number, since it uses as much as digits as its factorization.

51798719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7399824.

The product of its digits is 158760, while the sum is 47.

The square root of 51798719 is about 7197.1326929549. The cubic root of 51798719 is about 372.7689009244.

The spelling of 51798719 in words is "fifty-one million, seven hundred ninety-eight thousand, seven hundred nineteen".