3541631021 has 2 divisors, whose sum is σ = 3541631022. Its totient is φ = 3541631020.

The previous prime is 3541630987. The next prime is 3541631047. The reversal of 3541631021 is 1201361453.

It is an a-pointer prime, because the next prime (3541631047) can be obtained adding 3541631021 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2876713225 + 664917796 = 53635^2 + 25786^2 .

It is a cyclic number.

It is not a de Polignac number, because 3541631021 - 2¹⁰ = 3541629997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3541631081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770815510 + 1770815511.

It is an arithmetic number, because the mean of its divisors is an integer number (1770815511).

Almost surely, 2^3541631021 is an apocalyptic number.

It is an amenable number.

3541631021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3541631021 is an equidigital number, since it uses as much as digits as its factorization.

3541631021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 3541631021 is about 59511.6040869342. The cubic root of 3541631021 is about 1524.2905984392.

Adding to 3541631021 its reverse (1201361453), we get a palindrome (4742992474).

The spelling of 3541631021 in words is "three billion, five hundred forty-one million, six hundred thirty-one thousand, twenty-one".