2001051445 has 4 divisors (see below), whose sum is σ = 2401261740. Its totient is φ = 1600841152.

The previous prime is 2001051431. The next prime is 2001051449. The reversal of 2001051445 is 5441501002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 383885649 + 1617165796 = 19593^2 + 40214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001051445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001051449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200105140 + ... + 200105149.

It is an arithmetic number, because the mean of its divisors is an integer number (600315435).

Almost surely, 2^2001051445 is an apocalyptic number.

It is an amenable number.

2001051445 is a deficient number, since it is larger than the sum of its proper divisors (400210295).

2001051445 is an equidigital number, since it uses as much as digits as its factorization.

2001051445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400210294.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2001051445 is about 44733.1135178405. The cubic root of 2001051445 is about 1260.1418008295.

Adding to 2001051445 its reverse (5441501002), we get a palindrome (7442552447).

The spelling of 2001051445 in words is "two billion, one million, fifty-one thousand, four hundred forty-five".