2001156652 has 12 divisors (see below), whose sum is σ = 3820390056. Its totient is φ = 909616640.

The previous prime is 2001156613. The next prime is 2001156673. The reversal of 2001156652 is 2566511002.

It is a self number, because there is not a number n which added to its sum of digits gives 2001156652.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22740373 + ... + 22740460.

It is an arithmetic number, because the mean of its divisors is an integer number (318365838).

Almost surely, 2^2001156652 is an apocalyptic number.

2001156652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2001156652 is a deficient number, since it is larger than the sum of its proper divisors (1819233404).

2001156652 is a wasteful number, since it uses less digits than its factorization.

2001156652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45480848 (or 45480846 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 2001156652 is about 44734.2894433342. The cubic root of 2001156652 is about 1260.1638847887.

Adding to 2001156652 its reverse (2566511002), we get a palindrome (4567667654).

The spelling of 2001156652 in words is "two billion, one million, one hundred fifty-six thousand, six hundred fifty-two".