550421430 has 128 divisors (see below), whose sum is σ = 1497968640. Its totient is φ = 128494080.

The previous prime is 550421419. The next prime is 550421447. The reversal of 550421430 is 34124055.

550421430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 550421430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 640341 + ... + 641199.

It is an arithmetic number, because the mean of its divisors is an integer number (11702880).

Almost surely, 2^550421430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550421430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748984320).

550421430 is an abundant number, since it is smaller than the sum of its proper divisors (947547210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550421430 is a wasteful number, since it uses less digits than its factorization.

550421430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 550421430 is about 23461.0619964229. The cubic root of 550421430 is about 819.5304817584.

Adding to 550421430 its reverse (34124055), we get a palindrome (584545485).

The spelling of 550421430 in words is "five hundred fifty million, four hundred twenty-one thousand, four hundred thirty".