51516055 has 4 divisors (see below), whose sum is σ = 61819272. Its totient is φ = 41212840.

The previous prime is 51516043. The next prime is 51516071. The reversal of 51516055 is 55061515.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51516055 - 2⁷ = 51515927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5151601 + ... + 5151610.

It is an arithmetic number, because the mean of its divisors is an integer number (15454818).

Almost surely, 2^51516055 is an apocalyptic number.

51516055 is a deficient number, since it is larger than the sum of its proper divisors (10303217).

51516055 is a wasteful number, since it uses less digits than its factorization.

51516055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10303216.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 51516055 is about 7177.4685648911. The cubic root of 51516055 is about 372.0896010128.

The spelling of 51516055 in words is "fifty-one million, five hundred sixteen thousand, fifty-five".