550531421 has 4 divisors (see below), whose sum is σ = 600579744. Its totient is φ = 500483100.

The previous prime is 550531409. The next prime is 550531453. The reversal of 550531421 is 124135055.

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 a de Polignac number, because none of the positive numbers 2^k-550531421 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 (550531321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25024145 + ... + 25024166.

It is an arithmetic number, because the mean of its divisors is an integer number (150144936).

Almost surely, 2^550531421 is an apocalyptic number.

It is an amenable number.

550531421 is a deficient number, since it is larger than the sum of its proper divisors (50048323).

550531421 is a wasteful number, since it uses less digits than its factorization.

550531421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50048322.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 550531421 is about 23463.4059974250. The cubic root of 550531421 is about 819.5850671897.

Adding to 550531421 its reverse (124135055), we get a palindrome (674666476).

The spelling of 550531421 in words is "five hundred fifty million, five hundred thirty-one thousand, four hundred twenty-one".