3525865621 has 2 divisors, whose sum is σ = 3525865622. Its totient is φ = 3525865620.

The previous prime is 3525865591. The next prime is 3525865639. The reversal of 3525865621 is 1265685253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2920213521 + 605652100 = 54039^2 + 24610^2 .

It is a cyclic number.

It is not a de Polignac number, because 3525865621 - 2¹³ = 3525857429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3525862621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1762932810 + 1762932811.

It is an arithmetic number, because the mean of its divisors is an integer number (1762932811).

Almost surely, 2^3525865621 is an apocalyptic number.

It is an amenable number.

3525865621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3525865621 is an equidigital number, since it uses as much as digits as its factorization.

3525865621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432000, while the sum is 43.

The square root of 3525865621 is about 59378.9998315903. Note that the first 3 decimals coincide. The cubic root of 3525865621 is about 1522.0254653229.

The spelling of 3525865621 in words is "three billion, five hundred twenty-five million, eight hundred sixty-five thousand, six hundred twenty-one".