2001532251 has 8 divisors (see below), whose sum is σ = 2695132944. Its totient is φ = 1321143200.

The previous prime is 2001532231. The next prime is 2001532277. The reversal of 2001532251 is 1522351002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001532251 - 2⁶ = 2001532187 is a prime.

It is a super-2 number, since 2×2001532251² = 8012262703586254002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001532231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3302556 + ... + 3303161.

It is an arithmetic number, because the mean of its divisors is an integer number (336891618).

Almost surely, 2^2001532251 is an apocalyptic number.

2001532251 is a deficient number, since it is larger than the sum of its proper divisors (693600693).

2001532251 is a wasteful number, since it uses less digits than its factorization.

2001532251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605821.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2001532251 is about 44738.4873570844. The cubic root of 2001532251 is about 1260.2427203103.

Adding to 2001532251 its reverse (1522351002), we get a palindrome (3523883253).

The spelling of 2001532251 in words is "two billion, one million, five hundred thirty-two thousand, two hundred fifty-one".