51305471 has 4 divisors (see below), whose sum is σ = 58634832. Its totient is φ = 43976112.

The previous prime is 51305459. The next prime is 51305477. The reversal of 51305471 is 17450315.

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 51305471 - 2¹⁴ = 51289087 is a prime.

It is a super-3 number, since 3×51305471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51305471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51305477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3664670 + ... + 3664683.

It is an arithmetic number, because the mean of its divisors is an integer number (14658708).

Almost surely, 2^51305471 is an apocalyptic number.

51305471 is a deficient number, since it is larger than the sum of its proper divisors (7329361).

51305471 is an equidigital number, since it uses as much as digits as its factorization.

51305471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329360.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 51305471 is about 7162.7837465611. The cubic root of 51305471 is about 371.5819073367.

Adding to 51305471 its reverse (17450315), we get a palindrome (68755786).

It can be divided in two parts, 5130 and 5471, that added together give a palindrome (10601).

The spelling of 51305471 in words is "fifty-one million, three hundred five thousand, four hundred seventy-one".