2011281 has 16 divisors (see below), whose sum is σ = 2835456. Its totient is φ = 1265616.

The previous prime is 2011277. The next prime is 2011291. The reversal of 2011281 is 1821102.

It is not a de Polignac number, because 2011281 - 2² = 2011277 is a prime.

It is a super-2 number, since 2×2011281² = 8090502521922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2011281.

It is not an unprimeable number, because it can be changed into a prime (2011201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6966 + ... + 7248.

It is an arithmetic number, because the mean of its divisors is an integer number (177216).

2^2011281 is an apocalyptic number.

It is an amenable number.

2011281 is a deficient number, since it is larger than the sum of its proper divisors (824175).

2011281 is a wasteful number, since it uses less digits than its factorization.

2011281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2011281 is about 1418.1963897853. The cubic root of 2011281 is about 126.2285471505.

Adding to 2011281 its reverse (1821102), we get a palindrome (3832383).

The spelling of 2011281 in words is "two million, eleven thousand, two hundred eighty-one".