4231021225 has 12 divisors (see below), whose sum is σ = 5388263884. Its totient is φ = 3293334720.

The previous prime is 4231021211. The next prime is 4231021229. The reversal of 4231021225 is 5221201324.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 112975641 + 4118045584 = 10629^2 + 64172^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4231021225 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4231021196 and 4231021205.

It is not an unprimeable number, because it can be changed into a prime (4231021229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2286114 + ... + 2287963.

Almost surely, 2^4231021225 is an apocalyptic number.

It is an amenable number.

4231021225 is a deficient number, since it is larger than the sum of its proper divisors (1157242659).

4231021225 is a wasteful number, since it uses less digits than its factorization.

4231021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574124 (or 4574119 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 4231021225 is about 65046.3006250163. The cubic root of 4231021225 is about 1617.3911707621.

Adding to 4231021225 its reverse (5221201324), we get a palindrome (9452222549).

The spelling of 4231021225 in words is "four billion, two hundred thirty-one million, twenty-one thousand, two hundred twenty-five".