51261203 has 12 divisors (see below), whose sum is σ = 61019640. Its totient is φ = 42914592.

The previous prime is 51261187. The next prime is 51261209. The reversal of 51261203 is 30216215.

51261203 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 51261203 - 2⁴ = 51261187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51261209) 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 11 ways as a sum of consecutive naturals, for example, 10058 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (5084970).

Almost surely, 2^51261203 is an apocalyptic number.

51261203 is a deficient number, since it is larger than the sum of its proper divisors (9758437).

51261203 is a wasteful number, since it uses less digits than its factorization.

51261203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24386 (or 24379 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51261203 is about 7159.6929403432. The cubic root of 51261203 is about 371.4750056698.

Adding to 51261203 its reverse (30216215), we get a palindrome (81477418).

The spelling of 51261203 in words is "fifty-one million, two hundred sixty-one thousand, two hundred three".