55411521 has 16 divisors (see below), whose sum is σ = 81052608. Its totient is φ = 33393600.

The previous prime is 55411519. The next prime is 55411549. The reversal of 55411521 is 12511455.

It is not a de Polignac number, because 55411521 - 2¹ = 55411519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55411491 and 55411500.

It is not an unprimeable number, because it can be changed into a prime (55411511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1335 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (5065788).

Almost surely, 2^55411521 is an apocalyptic number.

It is an amenable number.

55411521 is a deficient number, since it is larger than the sum of its proper divisors (25641087).

55411521 is a wasteful number, since it uses less digits than its factorization.

55411521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9472.

The product of its digits is 1000, while the sum is 24.

The square root of 55411521 is about 7443.8915225841. The cubic root of 55411521 is about 381.2413719807.

Adding to 55411521 its reverse (12511455), we get a palindrome (67922976).

The spelling of 55411521 in words is "fifty-five million, four hundred eleven thousand, five hundred twenty-one".