550053123421 has 6 divisors (see below), whose sum is σ = 565321217370. Its totient is φ = 535186821456.

The previous prime is 550053123419. The next prime is 550053123463. The reversal of 550053123421 is 124321350055.

It can be written as a sum of positive squares in 3 ways, for example, as 406572016900 + 143481106521 = 637630^2 + 378789^2 .

It is not a de Polignac number, because 550053123421 - 2¹ = 550053123419 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 (550053123401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 200894586 + ... + 200897323.

It is an arithmetic number, because the mean of its divisors is an integer number (94220202895).

Almost surely, 2^550053123421 is an apocalyptic number.

It is an amenable number.

550053123421 is a deficient number, since it is larger than the sum of its proper divisors (15268093949).

550053123421 is an equidigital number, since it uses as much as digits as its factorization.

550053123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401791983 (or 401791946 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 550053123421 its reverse (124321350055), we get a palindrome (674374473476).

The spelling of 550053123421 in words is "five hundred fifty billion, fifty-three million, one hundred twenty-three thousand, four hundred twenty-one".