51057311 has 4 divisors (see below), whose sum is σ = 51109824. Its totient is φ = 51004800.

The previous prime is 51057289. The next prime is 51057323. The reversal of 51057311 is 11375015.

51057311 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 a cyclic number.

It is not a de Polignac number, because 51057311 - 2⁶ = 51057247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51057011) 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, 24770 + ... + 26751.

It is an arithmetic number, because the mean of its divisors is an integer number (12777456).

Almost surely, 2^51057311 is an apocalyptic number.

51057311 is a deficient number, since it is larger than the sum of its proper divisors (52513).

51057311 is an equidigital number, since it uses as much as digits as its factorization.

51057311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52512.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 51057311 is about 7145.4398744934. The cubic root of 51057311 is about 370.9818359181.

The spelling of 51057311 in words is "fifty-one million, fifty-seven thousand, three hundred eleven".