2297781 has 8 divisors (see below), whose sum is σ = 3404160. Its totient is φ = 1531836.

The previous prime is 2297777. The next prime is 2297797. The reversal of 2297781 is 1877922.

It is not a de Polignac number, because 2297781 - 2² = 2297777 is a prime.

It is a super-2 number, since 2×2297781² = 10559595047922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2297731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42525 + ... + 42578.

It is an arithmetic number, because the mean of its divisors is an integer number (425520).

2^2297781 is an apocalyptic number.

It is an amenable number.

2297781 is a deficient number, since it is larger than the sum of its proper divisors (1106379).

2297781 is an equidigital number, since it uses as much as digits as its factorization.

2297781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85112 (or 85106 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2297781 is about 1515.8433296354. The cubic root of 2297781 is about 131.9581478887.

The spelling of 2297781 in words is "two million, two hundred ninety-seven thousand, seven hundred eighty-one".