4223525021 has 2 divisors, whose sum is σ = 4223525022. Its totient is φ = 4223525020.

The previous prime is 4223524967. The next prime is 4223525039. The reversal of 4223525021 is 1205253224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3411844921 + 811680100 = 58411^2 + 28490^2 .

It is a cyclic number.

It is not a de Polignac number, because 4223525021 - 2¹⁴ = 4223508637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4223525041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2111762510 + 2111762511.

It is an arithmetic number, because the mean of its divisors is an integer number (2111762511).

Almost surely, 2^4223525021 is an apocalyptic number.

It is an amenable number.

4223525021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4223525021 is an equidigital number, since it uses as much as digits as its factorization.

4223525021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 4223525021 is about 64988.6530172768. The cubic root of 4223525021 is about 1616.4354155691.

Adding to 4223525021 its reverse (1205253224), we get a palindrome (5428778245).

The spelling of 4223525021 in words is "four billion, two hundred twenty-three million, five hundred twenty-five thousand, twenty-one".