2001089231 has 2 divisors, whose sum is σ = 2001089232. Its totient is φ = 2001089230.

The previous prime is 2001089191. The next prime is 2001089303. The reversal of 2001089231 is 1329801002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001089231 is a prime.

It is a super-2 number, since 2×2001089231² = 8008716220848342722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001089231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001089131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000544615 + 1000544616.

It is an arithmetic number, because the mean of its divisors is an integer number (1000544616).

Almost surely, 2^2001089231 is an apocalyptic number.

2001089231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001089231 is an equidigital number, since it uses as much as digits as its factorization.

2001089231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2001089231 is about 44733.5358651650. The cubic root of 2001089231 is about 1260.1497325627.

The spelling of 2001089231 in words is "two billion, one million, eighty-nine thousand, two hundred thirty-one".