51533350225 has 18 divisors (see below), whose sum is σ = 74334230214. Its totient is φ = 35337153600.

The previous prime is 51533350103. The next prime is 51533350237. The reversal of 51533350225 is 52205333515.

It can be written as a sum of positive squares in 3 ways, for example, as 12916777104 + 38616573121 = 113652^2 + 196511^2 .

It is not a de Polignac number, because 51533350225 - 2²⁵ = 51499795793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21032796 + ... + 21035245.

Almost surely, 2^51533350225 is an apocalyptic number.

It is an amenable number.

51533350225 is a deficient number, since it is larger than the sum of its proper divisors (22800879989).

51533350225 is a wasteful number, since it uses less digits than its factorization.

51533350225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42068065 (or 42068053 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 34.

The spelling of 51533350225 in words is "fifty-one billion, five hundred thirty-three million, three hundred fifty thousand, two hundred twenty-five".