5545214221 has 2 divisors, whose sum is σ = 5545214222. Its totient is φ = 5545214220.

The previous prime is 5545214219. The next prime is 5545214243. The reversal of 5545214221 is 1224125455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4097792196 + 1447422025 = 64014^2 + 38045^2 .

It is a cyclic number.

It is not a de Polignac number, because 5545214221 - 2¹ = 5545214219 is a prime.

Together with 5545214219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5545214261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2772607110 + 2772607111.

It is an arithmetic number, because the mean of its divisors is an integer number (2772607111).

Almost surely, 2^5545214221 is an apocalyptic number.

It is an amenable number.

5545214221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5545214221 is an equidigital number, since it uses as much as digits as its factorization.

5545214221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16000, while the sum is 31.

The square root of 5545214221 is about 74466.1951559229. The cubic root of 5545214221 is about 1769.9980019555.

Adding to 5545214221 its reverse (1224125455), we get a palindrome (6769339676).

The spelling of 5545214221 in words is "five billion, five hundred forty-five million, two hundred fourteen thousand, two hundred twenty-one".