2268504781 has 4 divisors (see below), whose sum is σ = 2311306812. Its totient is φ = 2225702752.

The previous prime is 2268504779. The next prime is 2268504809. The reversal of 2268504781 is 1874058622.

It is a happy number.

2268504781 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, and also an emirpimes, since its reverse is a distinct semiprime: 1874058622 = 2 ⋅937029311.

It can be written as a sum of positive squares in 2 ways, for example, as 695113225 + 1573391556 = 26365^2 + 39666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2268504781 - 2¹ = 2268504779 is a prime.

It is a super-2 number, since 2×2268504781² = 10292227882839715922, which contains 22 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 (2268504181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21400936 + ... + 21401041.

It is an arithmetic number, because the mean of its divisors is an integer number (577826703).

Almost surely, 2^2268504781 is an apocalyptic number.

It is an amenable number.

2268504781 is a deficient number, since it is larger than the sum of its proper divisors (42802031).

2268504781 is an equidigital number, since it uses as much as digits as its factorization.

2268504781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42802030.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 2268504781 is about 47628.8230066627. The cubic root of 2268504781 is about 1313.9532081949.

The spelling of 2268504781 in words is "two billion, two hundred sixty-eight million, five hundred four thousand, seven hundred eighty-one".