3631147021 has 2 divisors, whose sum is σ = 3631147022. Its totient is φ = 3631147020.

The previous prime is 3631147007. The next prime is 3631147027. The reversal of 3631147021 is 1207411363.

3631147021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3403438921 + 227708100 = 58339^2 + 15090^2 .

It is an emirp because it is prime and its reverse (1207411363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3631147021 - 2¹³ = 3631138829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3631147027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815573510 + 1815573511.

It is an arithmetic number, because the mean of its divisors is an integer number (1815573511).

Almost surely, 2^3631147021 is an apocalyptic number.

It is an amenable number.

3631147021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3631147021 is an equidigital number, since it uses as much as digits as its factorization.

3631147021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 3631147021 is about 60258.9995021491. Note that the first 3 decimals coincide. The cubic root of 3631147021 is about 1537.0262257686.

Adding to 3631147021 its reverse (1207411363), we get a palindrome (4838558384).

The spelling of 3631147021 in words is "three billion, six hundred thirty-one million, one hundred forty-seven thousand, twenty-one".