420503550 has 24 divisors (see below), whose sum is σ = 1042849176. Its totient is φ = 112134240.

The previous prime is 420503539. The next prime is 420503609. The reversal of 420503550 is 55305024.

It is a self number, because there is not a number n which added to its sum of digits gives 420503550.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1401529 + ... + 1401828.

It is an arithmetic number, because the mean of its divisors is an integer number (43452049).

Almost surely, 2^420503550 is an apocalyptic number.

420503550 is an abundant number, since it is smaller than the sum of its proper divisors (622345626).

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

420503550 is a wasteful number, since it uses less digits than its factorization.

420503550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803372 (or 2803367 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 420503550 is about 20506.1832138504. The cubic root of 420503550 is about 749.1864066291.

Adding to 420503550 its reverse (55305024), we get a palindrome (475808574).

The spelling of 420503550 in words is "four hundred twenty million, five hundred three thousand, five hundred fifty".