51084919 has 4 divisors (see below), whose sum is σ = 51129144. Its totient is φ = 51040696.

The previous prime is 51084851. The next prime is 51084937. The reversal of 51084919 is 91948015.

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 51084919 - 2²¹ = 48987767 is a prime.

It is a super-2 number, since 2×51084919² = 5219337898473122, 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 (51084959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20332 + ... + 22705.

It is an arithmetic number, because the mean of its divisors is an integer number (12782286).

Almost surely, 2^51084919 is an apocalyptic number.

51084919 is a deficient number, since it is larger than the sum of its proper divisors (44225).

51084919 is a wasteful number, since it uses less digits than its factorization.

51084919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44224.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 51084919 is about 7147.3714748850. The cubic root of 51084919 is about 371.0486903399.

It can be divided in two parts, 51084 and 919, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 51084919 in words is "fifty-one million, eighty-four thousand, nine hundred nineteen".