420200815 has 16 divisors (see below), whose sum is σ = 551128320. Its totient is φ = 306178560.

The previous prime is 420200779. The next prime is 420200819. The reversal of 420200815 is 518002024.

It is not a de Polignac number, because 420200815 - 2¹⁷ = 420069743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420200819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77100 + ... + 82369.

It is an arithmetic number, because the mean of its divisors is an integer number (34445520).

Almost surely, 2^420200815 is an apocalyptic number.

420200815 is a deficient number, since it is larger than the sum of its proper divisors (130927505).

420200815 is a wasteful number, since it uses less digits than its factorization.

420200815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159522.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 420200815 is about 20498.8003307511. The cubic root of 420200815 is about 749.0065750940.

Adding to 420200815 its reverse (518002024), we get a palindrome (938202839).

The spelling of 420200815 in words is "four hundred twenty million, two hundred thousand, eight hundred fifteen".