550555053221 has 4 divisors (see below), whose sum is σ = 574492229472. Its totient is φ = 526617876972.

The previous prime is 550555053197. The next prime is 550555053233. The reversal of 550555053221 is 122350555055.

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 550555053221 - 2⁶ = 550555053157 is a prime.

It is a super-2 number, since 2×550555053221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550555053281) 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, 11968588091 + ... + 11968588136.

It is an arithmetic number, because the mean of its divisors is an integer number (143623057368).

Almost surely, 2^550555053221 is an apocalyptic number.

It is an amenable number.

550555053221 is a deficient number, since it is larger than the sum of its proper divisors (23937176251).

550555053221 is a wasteful number, since it uses less digits than its factorization.

550555053221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23937176250.

The product of its (nonzero) digits is 187500, while the sum is 38.

The spelling of 550555053221 in words is "five hundred fifty billion, five hundred fifty-five million, fifty-three thousand, two hundred twenty-one".