51550625 has 20 divisors (see below), whose sum is σ = 73626432. Its totient is φ = 35346000.

The previous prime is 51550621. The next prime is 51550633. The reversal of 51550625 is 52605515.

It is not a de Polignac number, because 51550625 - 2² = 51550621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51550621) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1517 + ... + 10266.

Almost surely, 2^51550625 is an apocalyptic number.

It is an amenable number.

51550625 is a deficient number, since it is larger than the sum of its proper divisors (22075807).

51550625 is an equidigital number, since it uses as much as digits as its factorization.

51550625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11810 (or 11795 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 51550625 is about 7179.8763916937. The cubic root of 51550625 is about 372.1728130088.

The spelling of 51550625 in words is "fifty-one million, five hundred fifty thousand, six hundred twenty-five".