55809471 has 8 divisors (see below), whose sum is σ = 75354880. Its totient is φ = 36735192.

The previous prime is 55809451. The next prime is 55809491. The reversal of 55809471 is 17490855.

It is an interprime number because it is at equal distance from previous prime (55809451) and next prime (55809491).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55809471 - 2¹⁰ = 55808447 is a prime.

It is a super-3 number, since 3×55809471³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55809451) 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 7 ways as a sum of consecutive naturals, for example, 117505 + ... + 117978.

It is an arithmetic number, because the mean of its divisors is an integer number (9419360).

Almost surely, 2^55809471 is an apocalyptic number.

55809471 is a deficient number, since it is larger than the sum of its proper divisors (19545409).

55809471 is a wasteful number, since it uses less digits than its factorization.

55809471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235565.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 55809471 is about 7470.5736727510. The cubic root of 55809471 is about 382.1518520390.

It can be divided in two parts, 55809 and 471, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 55809471 in words is "fifty-five million, eight hundred nine thousand, four hundred seventy-one".