51489203 has 4 divisors (see below), whose sum is σ = 53727888. Its totient is φ = 49250520.

The previous prime is 51489199. The next prime is 51489223. The reversal of 51489203 is 30298415.

51489203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51489203 - 2² = 51489199 is a prime.

It is a super-2 number, since 2×51489203² = 5302276051150418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51489203.

It is not an unprimeable number, because it can be changed into a prime (51489223) 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 3 ways as a sum of consecutive naturals, for example, 1119308 + ... + 1119353.

It is an arithmetic number, because the mean of its divisors is an integer number (13431972).

Almost surely, 2^51489203 is an apocalyptic number.

51489203 is a deficient number, since it is larger than the sum of its proper divisors (2238685).

51489203 is a wasteful number, since it uses less digits than its factorization.

51489203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238684.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 51489203 is about 7175.5977451359. The cubic root of 51489203 is about 372.0249409994.

The spelling of 51489203 in words is "fifty-one million, four hundred eighty-nine thousand, two hundred three".