51505363 has 24 divisors (see below), whose sum is σ = 65750048. Its totient is φ = 39287808.

The previous prime is 51505343. The next prime is 51505367. The reversal of 51505363 is 36350515.

It is a happy number.

51505363 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 51505363 - 2¹⁷ = 51374291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505367) 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 23 ways as a sum of consecutive naturals, for example, 76195 + ... + 76867.

Almost surely, 2^51505363 is an apocalyptic number.

51505363 is a deficient number, since it is larger than the sum of its proper divisors (14244685).

51505363 is a wasteful number, since it uses less digits than its factorization.

51505363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 51505363 is about 7176.7236953919. The cubic root of 51505363 is about 372.0638572113.

Adding to 51505363 its reverse (36350515), we get a palindrome (87855878).

The spelling of 51505363 in words is "fifty-one million, five hundred five thousand, three hundred sixty-three".