51503545 has 8 divisors (see below), whose sum is σ = 62970696. Its totient is φ = 40425216.

The previous prime is 51503537. The next prime is 51503549. The reversal of 51503545 is 54530515.

51503545 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 9357481 + 42146064 = 3059^2 + 6492^2 .

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 51503545 - 2³ = 51503537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51503549) 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, 96912 + ... + 97441.

It is an arithmetic number, because the mean of its divisors is an integer number (7871337).

Almost surely, 2^51503545 is an apocalyptic number.

It is an amenable number.

51503545 is a deficient number, since it is larger than the sum of its proper divisors (11467151).

51503545 is a wasteful number, since it uses less digits than its factorization.

51503545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194411.

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

The square root of 51503545 is about 7176.5970348070. The cubic root of 51503545 is about 372.0594795438.

The spelling of 51503545 in words is "fifty-one million, five hundred three thousand, five hundred forty-five".