421040215 has 16 divisors (see below), whose sum is σ = 519911136. Its totient is φ = 327184000.

The previous prime is 421040203. The next prime is 421040227. The reversal of 421040215 is 512040124.

It is an interprime number because it is at equal distance from previous prime (421040203) and next prime (421040227).

It is not a de Polignac number, because 421040215 - 2¹³ = 421032023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421040192 and 421040201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18900 + ... + 34630.

It is an arithmetic number, because the mean of its divisors is an integer number (32494446).

Almost surely, 2^421040215 is an apocalyptic number.

421040215 is a deficient number, since it is larger than the sum of its proper divisors (98870921).

421040215 is a wasteful number, since it uses less digits than its factorization.

421040215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15890.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 421040215 is about 20519.2644848688. The cubic root of 421040215 is about 749.5049859459.

Adding to 421040215 its reverse (512040124), we get a palindrome (933080339).

Subtracting 421040215 from its reverse (512040124), we obtain a palindrome (90999909).

The spelling of 421040215 in words is "four hundred twenty-one million, forty thousand, two hundred fifteen".