2223956278 has 4 divisors (see below), whose sum is σ = 3335934420. Its totient is φ = 1111978138.

The previous prime is 2223956261. The next prime is 2223956311. The reversal of 2223956278 is 8726593222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2223956278² = 9891963052911226568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555989068 + ... + 555989071.

It is an arithmetic number, because the mean of its divisors is an integer number (833983605).

Almost surely, 2^2223956278 is an apocalyptic number.

2223956278 is a deficient number, since it is larger than the sum of its proper divisors (1111978142).

2223956278 is a wasteful number, since it uses less digits than its factorization.

2223956278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111978141.

The product of its digits is 725760, while the sum is 46.

The square root of 2223956278 is about 47158.8409314733. The cubic root of 2223956278 is about 1305.2952220819.

The spelling of 2223956278 in words is "two billion, two hundred twenty-three million, nine hundred fifty-six thousand, two hundred seventy-eight".