553213521 has 24 divisors (see below), whose sum is σ = 919074624. Its totient is φ = 314102880.

The previous prime is 553213517. The next prime is 553213543. The reversal of 553213521 is 125312355.

It is a happy number.

553213521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 553213521 - 2² = 553213517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (553213571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18075 + ... + 37856.

It is an arithmetic number, because the mean of its divisors is an integer number (38294776).

Almost surely, 2^553213521 is an apocalyptic number.

It is an amenable number.

553213521 is a deficient number, since it is larger than the sum of its proper divisors (365861103).

553213521 is a wasteful number, since it uses less digits than its factorization.

553213521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56101 (or 56098 counting only the distinct ones).

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

The square root of 553213521 is about 23520.4915127214. The cubic root of 553213521 is about 820.9138735530.

Adding to 553213521 its reverse (125312355), we get a palindrome (678525876).

The spelling of 553213521 in words is "five hundred fifty-three million, two hundred thirteen thousand, five hundred twenty-one".