553201221 has 12 divisors (see below), whose sum is σ = 771067808. Its totient is φ = 352764984.

The previous prime is 553201219. The next prime is 553201223. The reversal of 553201221 is 122102355.

It is an interprime number because it is at equal distance from previous prime (553201219) and next prime (553201223).

It is not a de Polignac number, because 553201221 - 2¹ = 553201219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553201223) 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, 172705 + ... + 175878.

Almost surely, 2^553201221 is an apocalyptic number.

It is an amenable number.

553201221 is a deficient number, since it is larger than the sum of its proper divisors (217866587).

553201221 is a wasteful number, since it uses less digits than its factorization.

553201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348632 (or 348609 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 553201221 is about 23520.2300371404. The cubic root of 553201221 is about 820.9077895155.

Adding to 553201221 its reverse (122102355), we get a palindrome (675303576).

The spelling of 553201221 in words is "five hundred fifty-three million, two hundred one thousand, two hundred twenty-one".