2001329251 has 2 divisors, whose sum is σ = 2001329252. Its totient is φ = 2001329250.

The previous prime is 2001329219. The next prime is 2001329321. The reversal of 2001329251 is 1529231002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001329251 - 2⁵ = 2001329219 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001321251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000664625 + 1000664626.

It is an arithmetic number, because the mean of its divisors is an integer number (1000664626).

Almost surely, 2^2001329251 is an apocalyptic number.

2001329251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001329251 is an equidigital number, since it uses as much as digits as its factorization.

2001329251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2001329251 is about 44736.2185594625. The cubic root of 2001329251 is about 1260.2001132990.

The spelling of 2001329251 in words is "two billion, one million, three hundred twenty-nine thousand, two hundred fifty-one".