51125205 has 48 divisors (see below), whose sum is σ = 90780480. Its totient is φ = 24482304.

The previous prime is 51125201. The next prime is 51125279. The reversal of 51125205 is 50252115.

51125205 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 51125205 - 2² = 51125201 is a prime.

It is a super-2 number, since 2×51125205² = 5227573172584050, which contains 22 as substring.

51125205 is a Rhonda number in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51125201) 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 47 ways as a sum of consecutive naturals, for example, 134706 + ... + 135084.

It is an arithmetic number, because the mean of its divisors is an integer number (1891260).

Almost surely, 2^51125205 is an apocalyptic number.

It is an amenable number.

51125205 is a deficient number, since it is larger than the sum of its proper divisors (39655275).

51125205 is a wasteful number, since it uses less digits than its factorization.

51125205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51125205 is about 7150.1891583370. The cubic root of 51125205 is about 371.1462020920.

The spelling of 51125205 in words is "fifty-one million, one hundred twenty-five thousand, two hundred five".