553351221 has 6 divisors (see below), whose sum is σ = 799285110. Its totient is φ = 368900808.

The previous prime is 553351213. The next prime is 553351237. The reversal of 553351221 is 122153355.

It is a happy number.

553351221 is a `hidden beast` number, since 5 + 533 + 5 + 122 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 287302500 + 266048721 = 16950^2 + 16311^2 .

It is not a de Polignac number, because 553351221 - 2³ = 553351213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553351261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30741726 + ... + 30741743.

It is an arithmetic number, because the mean of its divisors is an integer number (133214185).

Almost surely, 2^553351221 is an apocalyptic number.

It is an amenable number.

553351221 is a deficient number, since it is larger than the sum of its proper divisors (245933889).

553351221 is a wasteful number, since it uses less digits than its factorization.

553351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61483475 (or 61483472 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 553351221 is about 23523.4185653361. The cubic root of 553351221 is about 820.9819789400.

The spelling of 553351221 in words is "five hundred fifty-three million, three hundred fifty-one thousand, two hundred twenty-one".