55224521 has 8 divisors (see below), whose sum is σ = 60744288. Its totient is φ = 50202900.

The previous prime is 55224511. The next prime is 55224529. The reversal of 55224521 is 12542255.

It is not a de Polignac number, because 55224521 - 2¹⁴ = 55208137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55224529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19415 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (7593036).

Almost surely, 2^55224521 is an apocalyptic number.

It is an amenable number.

55224521 is a deficient number, since it is larger than the sum of its proper divisors (5519767).

55224521 is an equidigital number, since it uses as much as digits as its factorization.

55224521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41524 (or 41502 counting only the distinct ones).

The product of its digits is 4000, while the sum is 26.

The square root of 55224521 is about 7431.3202730067. The cubic root of 55224521 is about 380.8120239337.

Adding to 55224521 its reverse (12542255), we get a palindrome (67766776).

The spelling of 55224521 in words is "fifty-five million, two hundred twenty-four thousand, five hundred twenty-one".