4002020251 has 2 divisors, whose sum is σ = 4002020252. Its totient is φ = 4002020250.

The previous prime is 4002020207. The next prime is 4002020261. The reversal of 4002020251 is 1520202004.

4002020251 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4002020251 - 2⁷ = 4002020123 is a prime.

It is not a weakly prime, because it can be changed into another prime (4002020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001010125 + 2001010126.

It is an arithmetic number, because the mean of its divisors is an integer number (2001010126).

Almost surely, 2^4002020251 is an apocalyptic number.

4002020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002020251 is an equidigital number, since it uses as much as digits as its factorization.

4002020251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 4002020251 is about 63261.5226737391. The cubic root of 4002020251 is about 1587.6682527024.

Adding to 4002020251 its reverse (1520202004), we get a palindrome (5522222255).

The spelling of 4002020251 in words is "four billion, two million, twenty thousand, two hundred fifty-one".