2001223573 has 2 divisors, whose sum is σ = 2001223574. Its totient is φ = 2001223572.

The previous prime is 2001223547. The next prime is 2001223597. The reversal of 2001223573 is 3753221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1935824004 + 65399569 = 43998^2 + 8087^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001223573 - 2²⁵ = 1967669141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001223673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000611786 + 1000611787.

It is an arithmetic number, because the mean of its divisors is an integer number (1000611787).

Almost surely, 2^2001223573 is an apocalyptic number.

It is an amenable number.

2001223573 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001223573 is an equidigital number, since it uses as much as digits as its factorization.

2001223573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 2001223573 is about 44735.0374203487. The cubic root of 2001223573 is about 1260.1779317462.

Adding to 2001223573 its reverse (3753221002), we get a palindrome (5754444575).

The spelling of 2001223573 in words is "two billion, one million, two hundred twenty-three thousand, five hundred seventy-three".