51538225 has 12 divisors (see below), whose sum is σ = 65635804. Its totient is φ = 40115520.

The previous prime is 51538171. The next prime is 51538297. The reversal of 51538225 is 52283515.

It can be written as a sum of positive squares in 6 ways, for example, as 5948721 + 45589504 = 2439^2 + 6752^2 .

It is not a de Polignac number, because 51538225 - 2⁹ = 51537713 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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26934 + ... + 28783.

Almost surely, 2^51538225 is an apocalyptic number.

It is an amenable number.

51538225 is a deficient number, since it is larger than the sum of its proper divisors (14097579).

51538225 is a wasteful number, since it uses less digits than its factorization.

51538225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55764 (or 55759 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 51538225 is about 7179.0128151439. The cubic root of 51538225 is about 372.1429697692.

The spelling of 51538225 in words is "fifty-one million, five hundred thirty-eight thousand, two hundred twenty-five".