4225361221 has 4 divisors (see below), whose sum is σ = 4253719500. Its totient is φ = 4197002944.

The previous prime is 4225361183. The next prime is 4225361233. The reversal of 4225361221 is 1221635224.

4225361221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1425893121 + 2799468100 = 37761^2 + 52910^2 .

It is a cyclic number.

It is not a de Polignac number, because 4225361221 - 2⁹ = 4225360709 is a prime.

It is a super-2 number, since 2×4225361221² = 35707354895861221682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4225361221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4225361281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14178916 + ... + 14179213.

It is an arithmetic number, because the mean of its divisors is an integer number (1063429875).

Almost surely, 2^4225361221 is an apocalyptic number.

It is an amenable number.

4225361221 is a deficient number, since it is larger than the sum of its proper divisors (28358279).

4225361221 is a wasteful number, since it uses less digits than its factorization.

4225361221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28358278.

The product of its digits is 5760, while the sum is 28.

The square root of 4225361221 is about 65002.7785636891. The cubic root of 4225361221 is about 1616.6696329323.

Adding to 4225361221 its reverse (1221635224), we get a palindrome (5446996445).

The spelling of 4225361221 in words is "four billion, two hundred twenty-five million, three hundred sixty-one thousand, two hundred twenty-one".