55224513 has 12 divisors (see below), whose sum is σ = 81624400. Its totient is φ = 35959896.

The previous prime is 55224511. The next prime is 55224529. The reversal of 55224513 is 31542255.

It is a happy number.

It is not a de Polignac number, because 55224513 - 2¹ = 55224511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55224511) 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 11 ways as a sum of consecutive naturals, for example, 70963 + ... + 71736.

Almost surely, 2^55224513 is an apocalyptic number.

It is an amenable number.

55224513 is a deficient number, since it is larger than the sum of its proper divisors (26399887).

55224513 is a wasteful number, since it uses less digits than its factorization.

55224513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142748 (or 142745 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 55224513 is about 7431.3197347443. The cubic root of 55224513 is about 380.8120055452.

Adding to 55224513 its reverse (31542255), we get a palindrome (86766768).

The spelling of 55224513 in words is "fifty-five million, two hundred twenty-four thousand, five hundred thirteen".