4021226215 has 16 divisors (see below), whose sum is σ = 5116003200. Its totient is φ = 3025730592.

The previous prime is 4021226207. The next prime is 4021226263. The reversal of 4021226215 is 5126221204.

It is a cyclic number.

It is not a de Polignac number, because 4021226215 - 2³ = 4021226207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4021226215.

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, 139057 + ... + 165466.

It is an arithmetic number, because the mean of its divisors is an integer number (319750200).

Almost surely, 2^4021226215 is an apocalyptic number.

4021226215 is a deficient number, since it is larger than the sum of its proper divisors (1094776985).

4021226215 is a wasteful number, since it uses less digits than its factorization.

4021226215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304686.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4021226215 is about 63413.1391353559. The cubic root of 4021226215 is about 1590.2039761784.

Adding to 4021226215 its reverse (5126221204), we get a palindrome (9147447419).

The spelling of 4021226215 in words is "four billion, twenty-one million, two hundred twenty-six thousand, two hundred fifteen".