550021542 has 64 divisors (see below), whose sum is σ = 1300561920. Its totient is φ = 151815456.

The previous prime is 550021531. The next prime is 550021543. The reversal of 550021542 is 245120055.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550021543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154183 + ... + 157709.

It is an arithmetic number, because the mean of its divisors is an integer number (20321280).

Almost surely, 2^550021542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550021542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650280960).

550021542 is an abundant number, since it is smaller than the sum of its proper divisors (750540378).

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

550021542 is a wasteful number, since it uses less digits than its factorization.

550021542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 550021542 is about 23452.5380716033. The cubic root of 550021542 is about 819.3319673209.

Adding to 550021542 its reverse (245120055), we get a palindrome (795141597).

The spelling of 550021542 in words is "five hundred fifty million, twenty-one thousand, five hundred forty-two".