51225205 has 16 divisors (see below), whose sum is σ = 63379440. Its totient is φ = 39716352.

The previous prime is 51225179. The next prime is 51225227. The reversal of 51225205 is 50252215.

51225205 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 8 ways, for example, as 24039409 + 27185796 = 4903^2 + 5214^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225205 - 2¹³ = 51217013 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 75327 + ... + 76003.

It is an arithmetic number, because the mean of its divisors is an integer number (3961215).

Almost surely, 2^51225205 is an apocalyptic number.

It is an amenable number.

51225205 is a deficient number, since it is larger than the sum of its proper divisors (12154235).

51225205 is a wasteful number, since it uses less digits than its factorization.

51225205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51225205 is about 7157.1785642109. The cubic root of 51225205 is about 371.3880296339.

The spelling of 51225205 in words is "fifty-one million, two hundred twenty-five thousand, two hundred five".