51617471 has 4 divisors (see below), whose sum is σ = 54334200. Its totient is φ = 48900744.

The previous prime is 51617453. The next prime is 51617521. The reversal of 51617471 is 17471615.

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 51617471 - 2¹⁰ = 51616447 is a prime.

It is a super-3 number, since 3×51617471³ (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 (51617411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358336 + ... + 1358373.

It is an arithmetic number, because the mean of its divisors is an integer number (13583550).

Almost surely, 2^51617471 is an apocalyptic number.

51617471 is a deficient number, since it is larger than the sum of its proper divisors (2716729).

51617471 is a wasteful number, since it uses less digits than its factorization.

51617471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716728.

The product of its digits is 5880, while the sum is 32.

The square root of 51617471 is about 7184.5299776673. The cubic root of 51617471 is about 372.3336097553. Note that the first 3 decimals are identical.

The spelling of 51617471 in words is "fifty-one million, six hundred seventeen thousand, four hundred seventy-one".