51186919 has 10 divisors (see below), whose sum is σ = 59717320. Its totient is φ = 43872444.

The previous prime is 51186913. The next prime is 51186929. The reversal of 51186919 is 91968115.

51186919 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 51186919 - 2¹³ = 51178727 is a prime.

It is a super-3 number, since 3×51186919³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51186913) 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 9 ways as a sum of consecutive naturals, for example, 8259 + ... + 13060.

It is an arithmetic number, because the mean of its divisors is an integer number (5971732).

Almost surely, 2^51186919 is an apocalyptic number.

51186919 is a deficient number, since it is larger than the sum of its proper divisors (8530401).

51186919 is an frugal number, since it uses more digits than its factorization.

51186919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21347 (or 21326 counting only the distinct ones).

The product of its digits is 19440, while the sum is 40.

The square root of 51186919 is about 7154.5034069459. The cubic root of 51186919 is about 371.2954807541.

The spelling of 51186919 in words is "fifty-one million, one hundred eighty-six thousand, nine hundred nineteen".