51505453 has 8 divisors (see below), whose sum is σ = 52754328. Its totient is φ = 50266944.

The previous prime is 51505423. The next prime is 51505481. The reversal of 51505453 is 35450515.

51505453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23011209 + 28494244 = 4797^2 + 5338^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51505453 - 2¹⁷ = 51374381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505403) 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 7 ways as a sum of consecutive naturals, for example, 7975 + ... + 12907.

It is an arithmetic number, because the mean of its divisors is an integer number (6594291).

Almost surely, 2^51505453 is an apocalyptic number.

51505453 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51505453 is a deficient number, since it is larger than the sum of its proper divisors (1248875).

51505453 is a wasteful number, since it uses less digits than its factorization.

51505453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 51505453 is about 7176.7299656598. The cubic root of 51505453 is about 372.0640739248.

Adding to 51505453 its reverse (35450515), we get a palindrome (86955968).

The spelling of 51505453 in words is "fifty-one million, five hundred five thousand, four hundred fifty-three".