553105021 has 4 divisors (see below), whose sum is σ = 632120032. Its totient is φ = 474090012.

The previous prime is 553104983. The next prime is 553105027. The reversal of 553105021 is 120501355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 553105021 - 2²⁵ = 519550589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 553104983 and 553105001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553105027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39507495 + ... + 39507508.

It is an arithmetic number, because the mean of its divisors is an integer number (158030008).

Almost surely, 2^553105021 is an apocalyptic number.

It is an amenable number.

553105021 is a deficient number, since it is larger than the sum of its proper divisors (79015011).

553105021 is an equidigital number, since it uses as much as digits as its factorization.

553105021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79015010.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 553105021 is about 23518.1849002001. The cubic root of 553105021 is about 820.8602023059.

Adding to 553105021 its reverse (120501355), we get a palindrome (673606376).

The spelling of 553105021 in words is "five hundred fifty-three million, one hundred five thousand, twenty-one".