550420401 has 16 divisors (see below), whose sum is σ = 745778880. Its totient is φ = 361052160.

The previous prime is 550420357. The next prime is 550420417. The reversal of 550420401 is 104024055.

It is not a de Polignac number, because 550420401 - 2⁹ = 550419889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (550420421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41281 + ... + 52961.

It is an arithmetic number, because the mean of its divisors is an integer number (46611180).

Almost surely, 2^550420401 is an apocalyptic number.

It is an amenable number.

550420401 is a deficient number, since it is larger than the sum of its proper divisors (195358479).

550420401 is a wasteful number, since it uses less digits than its factorization.

550420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11936.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 550420401 is about 23461.0400664591. The cubic root of 550420401 is about 819.5299710603.

Adding to 550420401 its reverse (104024055), we get a palindrome (654444456).

The spelling of 550420401 in words is "five hundred fifty million, four hundred twenty thousand, four hundred one".