51208819 has 16 divisors (see below), whose sum is σ = 55111680. Its totient is φ = 47442240.

The previous prime is 51208793. The next prime is 51208831. The reversal of 51208819 is 91880215.

51208819 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 51208819 - 2¹⁵ = 51176051 is a prime.

It is a super-2 number, since 2×51208819² = 5244686286749522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51208889) 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, 268014 + ... + 268204.

It is an arithmetic number, because the mean of its divisors is an integer number (3444480).

Almost surely, 2^51208819 is an apocalyptic number.

51208819 is a deficient number, since it is larger than the sum of its proper divisors (3902861).

51208819 is a wasteful number, since it uses less digits than its factorization.

51208819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 51208819 is about 7156.0337478243. The cubic root of 51208819 is about 371.3484253463.

The spelling of 51208819 in words is "fifty-one million, two hundred eight thousand, eight hundred nineteen".