2001533445 has 24 divisors (see below), whose sum is σ = 3581240832. Its totient is φ = 1033048800.

The previous prime is 2001533441. The next prime is 2001533453. The reversal of 2001533445 is 5443351002.

2001533445 is a `hidden beast` number, since 200 + 15 + 3 + 3 + 445 = 666.

It is not a de Polignac number, because 2001533445 - 2² = 2001533441 is a prime.

It is a super-2 number, since 2×2001533445² = 8012272262907136050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001533441) 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 in 23 ways as a sum of consecutive naturals, for example, 716001 + ... + 718790.

It is an arithmetic number, because the mean of its divisors is an integer number (149218368).

Almost surely, 2^2001533445 is an apocalyptic number.

It is an amenable number.

2001533445 is a deficient number, since it is larger than the sum of its proper divisors (1579707387).

2001533445 is a wasteful number, since it uses less digits than its factorization.

2001533445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434833 (or 1434830 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 2001533445 is about 44738.5007012975. The cubic root of 2001533445 is about 1260.2429709066.

Adding to 2001533445 its reverse (5443351002), we get a palindrome (7444884447).

The spelling of 2001533445 in words is "two billion, one million, five hundred thirty-three thousand, four hundred forty-five".