51530203 has 8 divisors (see below), whose sum is σ = 51953328. Its totient is φ = 51109344.

The previous prime is 51530201. The next prime is 51530207. The reversal of 51530203 is 30203515.

51530203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51530203 - 2¹ = 51530201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51530201) 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, 116100 + ... + 116542.

It is an arithmetic number, because the mean of its divisors is an integer number (6494166).

Almost surely, 2^51530203 is an apocalyptic number.

51530203 is a deficient number, since it is larger than the sum of its proper divisors (423125).

51530203 is a wasteful number, since it uses less digits than its factorization.

51530203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 51530203 is about 7178.4540814858. The cubic root of 51530203 is about 372.1236605684.

Adding to 51530203 its reverse (30203515), we get a palindrome (81733718).

The spelling of 51530203 in words is "fifty-one million, five hundred thirty thousand, two hundred three".