2001355524 has 72 divisors (see below), whose sum is σ = 5790727488. Its totient is φ = 570922560.

The previous prime is 2001355483. The next prime is 2001355541. The reversal of 2001355524 is 4255531002.

It is a happy number.

2001355524 is a `hidden beast` number, since 2 + 0 + 0 + 135 + 5 + 524 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164739 + ... + 176469.

Almost surely, 2^2001355524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001355524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895363744).

2001355524 is an abundant number, since it is smaller than the sum of its proper divisors (3789371964).

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

2001355524 is a wasteful number, since it uses less digits than its factorization.

2001355524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12425 (or 12420 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2001355524 is about 44736.5122020034. The cubic root of 2001355524 is about 1260.2056278161.

Adding to 2001355524 its reverse (4255531002), we get a palindrome (6256886526).

The spelling of 2001355524 in words is "two billion, one million, three hundred fifty-five thousand, five hundred twenty-four".