420213503 has 8 divisors (see below), whose sum is σ = 424569600. Its totient is φ = 415865560.

The previous prime is 420213499. The next prime is 420213533. The reversal of 420213503 is 305312024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420213503 - 2² = 420213499 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 (420213533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199148 + ... + 201246.

It is an arithmetic number, because the mean of its divisors is an integer number (53071200).

Almost surely, 2^420213503 is an apocalyptic number.

420213503 is a deficient number, since it is larger than the sum of its proper divisors (4356097).

420213503 is a wasteful number, since it uses less digits than its factorization.

420213503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 420213503 is about 20499.1098099405. The cubic root of 420213503 is about 749.0141137909.

Adding to 420213503 its reverse (305312024), we get a palindrome (725525527).

The spelling of 420213503 in words is "four hundred twenty million, two hundred thirteen thousand, five hundred three".