2297881 has 2 divisors, whose sum is σ = 2297882. Its totient is φ = 2297880.

The previous prime is 2297863. The next prime is 2297887. The reversal of 2297881 is 1887922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 1032256 = 1125^2 + 1016^2 .

It is a cyclic number.

It is not a de Polignac number, because 2297881 - 2⁵ = 2297849 is a prime.

It is a super-2 number, since 2×2297881² = 10560514180322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2297881.

It is not a weakly prime, because it can be changed into another prime (2297887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1148940 + 1148941.

It is an arithmetic number, because the mean of its divisors is an integer number (1148941).

2^2297881 is an apocalyptic number.

It is an amenable number.

2297881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2297881 is an equidigital number, since it uses as much as digits as its factorization.

2297881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 2297881 is about 1515.8763142156. The cubic root of 2297881 is about 131.9600621448.

It can be divided in two parts, 22 and 97881, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 2297881 in words is "two million, two hundred ninety-seven thousand, eight hundred eighty-one".