2267780781 has 8 divisors (see below), whose sum is σ = 3455665984. Its totient is φ = 1295874720.

The previous prime is 2267780759. The next prime is 2267780813. The reversal of 2267780781 is 1870877622.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2267780781 - 2⁹ = 2267780269 is a prime.

It is a super-2 number, since 2×2267780781² = 10285659341345939922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2267780781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2267784781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53994760 + ... + 53994801.

It is an arithmetic number, because the mean of its divisors is an integer number (431958248).

Almost surely, 2^2267780781 is an apocalyptic number.

2267780781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2267780781 is a deficient number, since it is larger than the sum of its proper divisors (1187885203).

2267780781 is a wasteful number, since it uses less digits than its factorization.

2267780781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107989571.

The product of its (nonzero) digits is 526848, while the sum is 48.

The square root of 2267780781 is about 47621.2219603823. The cubic root of 2267780781 is about 1313.8134093058.

The spelling of 2267780781 in words is "two billion, two hundred sixty-seven million, seven hundred eighty thousand, seven hundred eighty-one".