550013330021 has 4 divisors (see below), whose sum is σ = 550015022700. Its totient is φ = 550011637344.

The previous prime is 550013330011. The next prime is 550013330039. The reversal of 550013330021 is 120033310055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288599956225 + 261413373796 = 537215^2 + 511286^2 .

It is a cyclic number.

It is not a de Polignac number, because 550013330021 - 2¹⁴ = 550013313637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550013330011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188486 + ... + 1065623.

It is an arithmetic number, because the mean of its divisors is an integer number (137503755675).

Almost surely, 2^550013330021 is an apocalyptic number.

It is an amenable number.

550013330021 is a deficient number, since it is larger than the sum of its proper divisors (1692679).

550013330021 is a wasteful number, since it uses less digits than its factorization.

550013330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692678.

The product of its (nonzero) digits is 1350, while the sum is 23.

Adding to 550013330021 its reverse (120033310055), we get a palindrome (670046640076).

The spelling of 550013330021 in words is "five hundred fifty billion, thirteen million, three hundred thirty thousand, twenty-one".