1601522201 has 2 divisors, whose sum is σ = 1601522202. Its totient is φ = 1601522200.

The previous prime is 1601522161. The next prime is 1601522249. The reversal of 1601522201 is 1022251061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1562146576 + 39375625 = 39524^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601522201 - 2¹⁸ = 1601260057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601522501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800761100 + 800761101.

It is an arithmetic number, because the mean of its divisors is an integer number (800761101).

Almost surely, 2^1601522201 is an apocalyptic number.

It is an amenable number.

1601522201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601522201 is an equidigital number, since it uses as much as digits as its factorization.

1601522201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1601522201 is about 40019.0229890736. The cubic root of 1601522201 is about 1169.9778896155.

Adding to 1601522201 its reverse (1022251061), we get a palindrome (2623773262).

The spelling of 1601522201 in words is "one billion, six hundred one million, five hundred twenty-two thousand, two hundred one".