4025215021 has 2 divisors, whose sum is σ = 4025215022. Its totient is φ = 4025215020.

The previous prime is 4025214931. The next prime is 4025215049. The reversal of 4025215021 is 1205125204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3689226121 + 335988900 = 60739^2 + 18330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4025215021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4025214983 and 4025215001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4025215081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2012607510 + 2012607511.

It is an arithmetic number, because the mean of its divisors is an integer number (2012607511).

Almost surely, 2^4025215021 is an apocalyptic number.

It is an amenable number.

4025215021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025215021 is an equidigital number, since it uses as much as digits as its factorization.

4025215021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 4025215021 is about 63444.5822824928. The cubic root of 4025215021 is about 1590.7295968626.

The spelling of 4025215021 in words is "four billion, twenty-five million, two hundred fifteen thousand, twenty-one".