2001522544 has 20 divisors (see below), whose sum is σ = 4431943024. Its totient is φ = 857795328.

The previous prime is 2001522521. The next prime is 2001522553. The reversal of 2001522544 is 4452251002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8935257 + ... + 8935480.

Almost surely, 2^2001522544 is an apocalyptic number.

It is an amenable number.

2001522544 is an abundant number, since it is smaller than the sum of its proper divisors (2430420480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001522544 is a wasteful number, since it uses less digits than its factorization.

2001522544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17870752 (or 17870746 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2001522544 is about 44738.3788709426. The cubic root of 2001522544 is about 1260.2406830052.

Adding to 2001522544 its reverse (4452251002), we get a palindrome (6453773546).

The spelling of 2001522544 in words is "two billion, one million, five hundred twenty-two thousand, five hundred forty-four".