553513221 has 6 divisors (see below), whose sum is σ = 799519110. Its totient is φ = 369008808.

The previous prime is 553513201. The next prime is 553513223. The reversal of 553513221 is 122315355.

It is a happy number.

553513221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 552485025 + 1028196 = 23505^2 + 1014^2 .

It is not a de Polignac number, because 553513221 - 2⁵ = 553513189 is a prime.

It is a super-4 number, since 4×553513221⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553513223) 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, 30750726 + ... + 30750743.

It is an arithmetic number, because the mean of its divisors is an integer number (133253185).

Almost surely, 2^553513221 is an apocalyptic number.

It is an amenable number.

553513221 is a deficient number, since it is larger than the sum of its proper divisors (246005889).

553513221 is a wasteful number, since it uses less digits than its factorization.

553513221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61501475 (or 61501472 counting only the distinct ones).

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

The square root of 553513221 is about 23526.8616904168. The cubic root of 553513221 is about 821.0620884610.

Adding to 553513221 its reverse (122315355), we get a palindrome (675828576).

The spelling of 553513221 in words is "five hundred fifty-three million, five hundred thirteen thousand, two hundred twenty-one".