550231021533 has 4 divisors (see below), whose sum is σ = 733641362048. Its totient is φ = 366820681020.

The previous prime is 550231021519. The next prime is 550231021553. The reversal of 550231021533 is 335120132055.

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 not a de Polignac number, because 550231021533 - 2¹² = 550231017437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550231021533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550231021513) 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, 91705170253 + ... + 91705170258.

It is an arithmetic number, because the mean of its divisors is an integer number (183410340512).

Almost surely, 2^550231021533 is an apocalyptic number.

It is an amenable number.

550231021533 is a deficient number, since it is larger than the sum of its proper divisors (183410340515).

550231021533 is a wasteful number, since it uses less digits than its factorization.

550231021533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183410340514.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 550231021533 its reverse (335120132055), we get a palindrome (885351153588).

The spelling of 550231021533 in words is "five hundred fifty billion, two hundred thirty-one million, twenty-one thousand, five hundred thirty-three".