2001224450 has 12 divisors (see below), whose sum is σ = 3722277570. Its totient is φ = 800489760.

The previous prime is 2001224443. The next prime is 2001224453. The reversal of 2001224450 is 544221002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 723233449 + 1277991001 = 26893^2 + 35749^2 .

It is not an unprimeable number, because it can be changed into a prime (2001224453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20012195 + ... + 20012294.

Almost surely, 2^2001224450 is an apocalyptic number.

2001224450 is a deficient number, since it is larger than the sum of its proper divisors (1721053120).

2001224450 is a wasteful number, since it uses less digits than its factorization.

2001224450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40024501 (or 40024496 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2001224450 is about 44735.0472225078. The cubic root of 2001224450 is about 1260.1781158295.

Adding to 2001224450 its reverse (544221002), we get a palindrome (2545445452).

The spelling of 2001224450 in words is "two billion, one million, two hundred twenty-four thousand, four hundred fifty".