4021224345 has 40 divisors (see below), whose sum is σ = 7307216136. Its totient is φ = 2115258624.

The previous prime is 4021224341. The next prime is 4021224359. The reversal of 4021224345 is 5434221204.

4021224345 is a `hidden beast` number, since 402 + 1 + 224 + 34 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 236021769 + 3785202576 = 15363^2 + 61524^2 .

It is not a de Polignac number, because 4021224345 - 2² = 4021224341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4021224341) 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 39 ways as a sum of consecutive naturals, for example, 38442 + ... + 97571.

Almost surely, 2^4021224345 is an apocalyptic number.

4021224345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4021224345 is a deficient number, since it is larger than the sum of its proper divisors (3285991791).

4021224345 is a wasteful number, since it uses less digits than its factorization.

4021224345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136103 (or 136094 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 4021224345 is about 63413.1243907758. The cubic root of 4021224345 is about 1590.2037296796.

Adding to 4021224345 its reverse (5434221204), we get a palindrome (9455445549).

The spelling of 4021224345 in words is "four billion, twenty-one million, two hundred twenty-four thousand, three hundred forty-five".