55614221 has 12 divisors (see below), whose sum is σ = 60863292. Its totient is φ = 50516928.

The previous prime is 55614203. The next prime is 55614227. The reversal of 55614221 is 12241655.

It can be written as a sum of positive squares in 2 ways, for example, as 15100996 + 40513225 = 3886^2 + 6365^2 .

It is not a de Polignac number, because 55614221 - 2¹⁰ = 55613197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55614227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57881 + ... + 58833.

It is an arithmetic number, because the mean of its divisors is an integer number (5071941).

Almost surely, 2^55614221 is an apocalyptic number.

It is an amenable number.

55614221 is a deficient number, since it is larger than the sum of its proper divisors (5249071).

55614221 is an equidigital number, since it uses as much as digits as its factorization.

55614221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1033 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 55614221 is about 7457.4942842754. The cubic root of 55614221 is about 381.7056772755.

Adding to 55614221 its reverse (12241655), we get a palindrome (67855876).

The spelling of 55614221 in words is "fifty-five million, six hundred fourteen thousand, two hundred twenty-one".