3505931021 has 2 divisors, whose sum is σ = 3505931022. Its totient is φ = 3505931020.

The previous prime is 3505930993. The next prime is 3505931059. The reversal of 3505931021 is 1201395053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2025990121 + 1479940900 = 45011^2 + 38470^2 .

It is a cyclic number.

It is not a de Polignac number, because 3505931021 - 2¹⁸ = 3505668877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3505931621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1752965510 + 1752965511.

It is an arithmetic number, because the mean of its divisors is an integer number (1752965511).

Almost surely, 2^3505931021 is an apocalyptic number.

It is an amenable number.

3505931021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3505931021 is an equidigital number, since it uses as much as digits as its factorization.

3505931021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 3505931021 is about 59210.9028895861. The cubic root of 3505931021 is about 1519.1516244794.

The spelling of 3505931021 in words is "three billion, five hundred five million, nine hundred thirty-one thousand, twenty-one".