51256163 has 4 divisors (see below), whose sum is σ = 58578480. Its totient is φ = 43933848.

The previous prime is 51256151. The next prime is 51256169. The reversal of 51256163 is 36165215.

51256163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51256163 - 2⁶ = 51256099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51256169) 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 3 ways as a sum of consecutive naturals, for example, 3661148 + ... + 3661161.

It is an arithmetic number, because the mean of its divisors is an integer number (14644620).

Almost surely, 2^51256163 is an apocalyptic number.

51256163 is a deficient number, since it is larger than the sum of its proper divisors (7322317).

51256163 is an equidigital number, since it uses as much as digits as its factorization.

51256163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322316.

The product of its digits is 5400, while the sum is 29.

The square root of 51256163 is about 7159.3409612897. The cubic root of 51256163 is about 371.4628308002.

The spelling of 51256163 in words is "fifty-one million, two hundred fifty-six thousand, one hundred sixty-three".