2288261 has 2 divisors, whose sum is σ = 2288262. Its totient is φ = 2288260.

The previous prime is 2288257. The next prime is 2288263. The reversal of 2288261 is 1628822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2102500 + 185761 = 1450^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 2288261 - 2² = 2288257 is a prime.

It is a super-2 number, since 2×2288261² = 10472276808242, which contains 22 as substring.

Together with 2288263, 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 (2288263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144130 + 1144131.

It is an arithmetic number, because the mean of its divisors is an integer number (1144131).

2^2288261 is an apocalyptic number.

2288261 is the 677-th centered decagonal number.

It is an amenable number.

2288261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2288261 is an equidigital number, since it uses as much as digits as its factorization.

2288261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The square root of 2288261 is about 1512.6999041449. The cubic root of 2288261 is about 131.7756558097.

The spelling of 2288261 in words is "two million, two hundred eighty-eight thousand, two hundred sixty-one".