51320265 has 32 divisors (see below), whose sum is σ = 84464640. Its totient is φ = 26598336.

The previous prime is 51320257. The next prime is 51320267. The reversal of 51320265 is 56202315.

51320265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51320265 - 2³ = 51320257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51320267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90874 + ... + 91436.

It is an arithmetic number, because the mean of its divisors is an integer number (2639520).

Almost surely, 2^51320265 is an apocalyptic number.

It is an amenable number.

51320265 is a deficient number, since it is larger than the sum of its proper divisors (33144375).

51320265 is a wasteful number, since it uses less digits than its factorization.

51320265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51320265 is about 7163.8163711809. The cubic root of 51320265 is about 371.6176192815.

The spelling of 51320265 in words is "fifty-one million, three hundred twenty thousand, two hundred sixty-five".