51485265 has 96 divisors (see below), whose sum is σ = 105670656. Its totient is φ = 22947840.

The previous prime is 51485263. The next prime is 51485303. The reversal of 51485265 is 56258415.

51485265 is a `hidden beast` number, since 514 + 85 + 2 + 65 = 666.

It is not a de Polignac number, because 51485265 - 2¹ = 51485263 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51485261) 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 95 ways as a sum of consecutive naturals, for example, 308212 + ... + 308378.

It is an arithmetic number, because the mean of its divisors is an integer number (1100736).

Almost surely, 2^51485265 is an apocalyptic number.

It is an amenable number.

51485265 is an abundant number, since it is smaller than the sum of its proper divisors (54185391).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51485265 is a wasteful number, since it uses less digits than its factorization.

51485265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 236 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 51485265 is about 7175.3233376622. The cubic root of 51485265 is about 372.0154563470.

The spelling of 51485265 in words is "fifty-one million, four hundred eighty-five thousand, two hundred sixty-five".