553521 has 8 divisors (see below), whose sum is σ = 741664. Its totient is φ = 367200.

The previous prime is 553517. The next prime is 553529. The reversal of 553521 is 125355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 553521 - 2² = 553517 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 553521.

It is not an unprimeable number, because it can be changed into a prime (553529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (92708).

2⁵⁵³⁵²¹ is an apocalyptic number.

It is an amenable number.

553521 is a deficient number, since it is larger than the sum of its proper divisors (188143).

553521 is a wasteful number, since it uses less digits than its factorization.

553521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its digits is 750, while the sum is 21.

The square root of 553521 is about 743.9899192865. The cubic root of 553521 is about 82.1065934808.

Adding to 553521 its reverse (125355), we get a palindrome (678876).

The spelling of 553521 in words is "five hundred fifty-three thousand, five hundred twenty-one".