51382825 has 24 divisors (see below), whose sum is σ = 70486808.
Its totient is φ = 36910080.
The previous prime is 51382813. The next prime is 51382829. The reversal of 51382825 is 52828315.
It can be divided in two parts, 513 and 82825, that added together give a palindrome (83338).
It can be written as a sum of positive squares in 12 ways, for example, as 17405584 + 33977241 = 4172^2 + 5829^2
It is not a de Polignac number, because 51382825 - 213 = 51374633 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (51382829) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9889 + ... + 14161.
Almost surely, 251382825 is an apocalyptic number.
It is an amenable number.
51382825 is a deficient number, since it is larger than the sum of its proper divisors (19103983).
51382825 is a wasteful number, since it uses less digits than its factorization.
51382825 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4333 (or 4328 counting only the distinct ones).
The product of its digits is 19200, while the sum is 34.
The square root of 51382825 is about 7168.1814290655.
The cubic root of 51382825 is about 371.7685600321.
The spelling of 51382825 in words is "fifty-one million, three hundred eighty-two thousand, eight hundred twenty-five".