3531028021 has 2 divisors, whose sum is σ = 3531028022. Its totient is φ = 3531028020.

The previous prime is 3531028013. The next prime is 3531028043. The reversal of 3531028021 is 1208201353.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1893207121 + 1637820900 = 43511^2 + 40470^2 .

It is an emirp because it is prime and its reverse (1208201353) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3531028021 - 2³ = 3531028013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3531028051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1765514010 + 1765514011.

It is an arithmetic number, because the mean of its divisors is an integer number (1765514011).

Almost surely, 2^3531028021 is an apocalyptic number.

It is an amenable number.

3531028021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3531028021 is an equidigital number, since it uses as much as digits as its factorization.

3531028021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3531028021 is about 59422.4538453269. The cubic root of 3531028021 is about 1522.7679281639.

Adding to 3531028021 its reverse (1208201353), we get a palindrome (4739229374).

The spelling of 3531028021 in words is "three billion, five hundred thirty-one million, twenty-eight thousand, twenty-one".