4130031821 has 2 divisors, whose sum is σ = 4130031822. Its totient is φ = 4130031820.

The previous prime is 4130031811. The next prime is 4130031923. The reversal of 4130031821 is 1281300314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3880044100 + 249987721 = 62290^2 + 15811^2 .

It is a cyclic number.

It is not a de Polignac number, because 4130031821 - 2¹⁰ = 4130030797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4130031811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2065015910 + 2065015911.

It is an arithmetic number, because the mean of its divisors is an integer number (2065015911).

Almost surely, 2^4130031821 is an apocalyptic number.

It is an amenable number.

4130031821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4130031821 is an equidigital number, since it uses as much as digits as its factorization.

4130031821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 4130031821 is about 64265.3236279099. The cubic root of 4130031821 is about 1604.4190106721.

The spelling of 4130031821 in words is "four billion, one hundred thirty million, thirty-one thousand, eight hundred twenty-one".