55547481 has 16 divisors (see below), whose sum is σ = 81708480. Its totient is φ = 33285120.

The previous prime is 55547447. The next prime is 55547491. The reversal of 55547481 is 18474555.

It is not a de Polignac number, because 55547481 - 2⁹ = 55546969 is a prime.

It is a super-2 number, since 2×55547481² = 6171045290890722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55547411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6520 + ... + 12393.

It is an arithmetic number, because the mean of its divisors is an integer number (5106780).

Almost surely, 2^55547481 is an apocalyptic number.

It is an amenable number.

55547481 is a deficient number, since it is larger than the sum of its proper divisors (26160999).

55547481 is a wasteful number, since it uses less digits than its factorization.

55547481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19016.

The product of its digits is 112000, while the sum is 39.

The square root of 55547481 is about 7453.0182476632. The cubic root of 55547481 is about 381.5529271713.

It can be divided in two parts, 555474 and 81, that added together give a palindrome (555555).

The spelling of 55547481 in words is "fifty-five million, five hundred forty-seven thousand, four hundred eighty-one".