2231261 has 4 divisors (see below), whose sum is σ = 2285724. Its totient is φ = 2176800.

The previous prime is 2231219. The next prime is 2231269. The reversal of 2231261 is 1621322.

2231261 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 can be written as a sum of positive squares in 2 ways, for example, as 988036 + 1243225 = 994^2 + 1115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2231261 is a prime.

It is a super-3 number, since 3×2231261³ = 33325170361843897743, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231269) 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, 27170 + ... + 27251.

It is an arithmetic number, because the mean of its divisors is an integer number (571431).

2^2231261 is an apocalyptic number.

It is an amenable number.

2231261 is a deficient number, since it is larger than the sum of its proper divisors (54463).

2231261 is an equidigital number, since it uses as much as digits as its factorization.

2231261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54462.

The product of its digits is 144, while the sum is 17.

The square root of 2231261 is about 1493.7406066650. The cubic root of 2231261 is about 130.6722767907.

Adding to 2231261 its reverse (1621322), we get a palindrome (3852583).

The spelling of 2231261 in words is "two million, two hundred thirty-one thousand, two hundred sixty-one".