2280782261 has 4 divisors (see below), whose sum is σ = 2280880800. Its totient is φ = 2280683724.

The previous prime is 2280782213. The next prime is 2280782279. The reversal of 2280782261 is 1622870822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1622870822 = 2 ⋅811435411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2280782261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2280782201) 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, 6470 + ... + 67848.

It is an arithmetic number, because the mean of its divisors is an integer number (570220200).

Almost surely, 2^2280782261 is an apocalyptic number.

It is an amenable number.

2280782261 is a deficient number, since it is larger than the sum of its proper divisors (98539).

2280782261 is an equidigital number, since it uses as much as digits as its factorization.

2280782261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98538.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 2280782261 is about 47757.5361696979. The cubic root of 2280782261 is about 1316.3193803366.

The spelling of 2280782261 in words is "two billion, two hundred eighty million, seven hundred eighty-two thousand, two hundred sixty-one".