2251311 has 4 divisors (see below), whose sum is σ = 3001752. Its totient is φ = 1500872.

The previous prime is 2251297. The next prime is 2251331. The reversal of 2251311 is 1131522.

2251311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2251311 - 2⁵ = 2251279 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375216 + ... + 375221.

It is an arithmetic number, because the mean of its divisors is an integer number (750438).

2^2251311 is an apocalyptic number.

2251311 is a deficient number, since it is larger than the sum of its proper divisors (750441).

2251311 is an equidigital number, since it uses as much as digits as its factorization.

2251311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750440.

The product of its digits is 60, while the sum is 15.

The square root of 2251311 is about 1500.4369363622. The cubic root of 2251311 is about 131.0625150799.

Adding to 2251311 its reverse (1131522), we get a palindrome (3382833).

The spelling of 2251311 in words is "two million, two hundred fifty-one thousand, three hundred eleven".