2219124778 has 32 divisors (see below), whose sum is σ = 3747163392. Its totient is φ = 977961600.

The previous prime is 2219124751. The next prime is 2219124793. The reversal of 2219124778 is 8774219122.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374398 + ... + 380278.

It is an arithmetic number, because the mean of its divisors is an integer number (117098856).

Almost surely, 2^2219124778 is an apocalyptic number.

2219124778 is a deficient number, since it is larger than the sum of its proper divisors (1528038614).

2219124778 is a wasteful number, since it uses less digits than its factorization.

2219124778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6550.

The product of its digits is 112896, while the sum is 43.

The square root of 2219124778 is about 47107.5872657473. The cubic root of 2219124778 is about 1304.3492942645.

The spelling of 2219124778 in words is "two billion, two hundred nineteen million, one hundred twenty-four thousand, seven hundred seventy-eight".