55561471 has 8 divisors (see below), whose sum is σ = 63545504. Its totient is φ = 47589120.

The previous prime is 55561469. The next prime is 55561481. The reversal of 55561471 is 17416555.

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

It is a cyclic number.

It is not a de Polignac number, because 55561471 - 2¹ = 55561469 is a prime.

It is a super-3 number, since 3×55561471³ (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 (55561481) 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 7 ways as a sum of consecutive naturals, for example, 13291 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (7943188).

Almost surely, 2^55561471 is an apocalyptic number.

55561471 is a deficient number, since it is larger than the sum of its proper divisors (7984033).

55561471 is a wasteful number, since it uses less digits than its factorization.

55561471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841.

The product of its digits is 21000, while the sum is 34.

The square root of 55561471 is about 7453.9567345136. The cubic root of 55561471 is about 381.5849566908.

It can be divided in two parts, 555 and 61471, that added together give a palindrome (62026).

The spelling of 55561471 in words is "fifty-five million, five hundred sixty-one thousand, four hundred seventy-one".