2001511 has 2 divisors, whose sum is σ = 2001512. Its totient is φ = 2001510.

The previous prime is 2001509. The next prime is 2001533. The reversal of 2001511 is 1151002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001511 - 2¹ = 2001509 is a prime.

Together with 2001509, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000755 + 1000756.

It is an arithmetic number, because the mean of its divisors is an integer number (1000756).

2^2001511 is an apocalyptic number.

2001511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001511 is an equidigital number, since it uses as much as digits as its factorization.

2001511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 2001511 is about 1414.7476806837. The cubic root of 2001511 is about 126.0238260142.

Adding to 2001511 its reverse (1151002), we get a palindrome (3152513).

It can be divided in two parts, 200 and 1511, that added together give a triangular number (1711 = T₅₈).

The spelling of 2001511 in words is "two million, one thousand, five hundred eleven".