51905471 has 4 divisors (see below), whose sum is σ = 54958752. Its totient is φ = 48852192.

The previous prime is 51905459. The next prime is 51905479. The reversal of 51905471 is 17450915.

51905471 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, and also an emirpimes, since its reverse is a distinct semiprime: 17450915 = 5 ⋅3490183.

It is a cyclic number.

It is not a de Polignac number, because 51905471 - 2⁶ = 51905407 is a prime.

It is a super-3 number, since 3×51905471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51905479) 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, 1526615 + ... + 1526648.

It is an arithmetic number, because the mean of its divisors is an integer number (13739688).

Almost surely, 2^51905471 is an apocalyptic number.

51905471 is a deficient number, since it is larger than the sum of its proper divisors (3053281).

51905471 is a wasteful number, since it uses less digits than its factorization.

51905471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053280.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 51905471 is about 7204.5451626040. The cubic root of 51905471 is about 373.0248050645.

The spelling of 51905471 in words is "fifty-one million, nine hundred five thousand, four hundred seventy-one".