51505355 has 16 divisors (see below), whose sum is σ = 67564800. Its totient is φ = 37380960.

The previous prime is 51505343. The next prime is 51505367. The reversal of 51505355 is 55350515.

51505355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51505343) and next prime (51505367).

It is not a de Polignac number, because 51505355 - 2⁴ = 51505339 is a prime.

It is an unprimeable number.

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, 50036 + ... + 51054.

It is an arithmetic number, because the mean of its divisors is an integer number (4222800).

Almost surely, 2^51505355 is an apocalyptic number.

51505355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51505355 is a deficient number, since it is larger than the sum of its proper divisors (16059445).

51505355 is a wasteful number, since it uses less digits than its factorization.

51505355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its (nonzero) digits is 9375, while the sum is 29.

The square root of 51505355 is about 7176.7231380345. The cubic root of 51505355 is about 372.0638379478.

The spelling of 51505355 in words is "fifty-one million, five hundred five thousand, three hundred fifty-five".