3520022521 has 2 divisors, whose sum is σ = 3520022522. Its totient is φ = 3520022520.

The previous prime is 3520022497. The next prime is 3520022563. The reversal of 3520022521 is 1252200253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2153980921 + 1366041600 = 46411^2 + 36960^2 .

It is a cyclic number.

It is not a de Polignac number, because 3520022521 - 2¹⁷ = 3519891449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3520022492 and 3520022501.

It is not a weakly prime, because it can be changed into another prime (3520022021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760011260 + 1760011261.

It is an arithmetic number, because the mean of its divisors is an integer number (1760011261).

Almost surely, 2^3520022521 is an apocalyptic number.

It is an amenable number.

3520022521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3520022521 is an equidigital number, since it uses as much as digits as its factorization.

3520022521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 3520022521 is about 59329.7776921505. Note that the first 3 decimals coincide. The cubic root of 3520022521 is about 1521.1842284754.

Adding to 3520022521 its reverse (1252200253), we get a palindrome (4772222774).

The spelling of 3520022521 in words is "three billion, five hundred twenty million, twenty-two thousand, five hundred twenty-one".