4020631501 has 2 divisors, whose sum is σ = 4020631502. Its totient is φ = 4020631500.

The previous prime is 4020631493. The next prime is 4020631607. The reversal of 4020631501 is 1051360204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2545303401 + 1475328100 = 50451^2 + 38410^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020631501 - 2³ = 4020631493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020631301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010315750 + 2010315751.

It is an arithmetic number, because the mean of its divisors is an integer number (2010315751).

Almost surely, 2^4020631501 is an apocalyptic number.

It is an amenable number.

4020631501 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020631501 is an equidigital number, since it uses as much as digits as its factorization.

4020631501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4020631501 is about 63408.4497602646. The cubic root of 4020631501 is about 1590.1255785999.

Adding to 4020631501 its reverse (1051360204), we get a palindrome (5071991705).

The spelling of 4020631501 in words is "four billion, twenty million, six hundred thirty-one thousand, five hundred one".