2212443978 has 16 divisors (see below), whose sum is σ = 4508377056. Its totient is φ = 723566480.

The previous prime is 2212443977. The next prime is 2212443979. The reversal of 2212443978 is 8793442122.

It is an interprime number because it is at equal distance from previous prime (2212443977) and next prime (2212443979).

It is not an unprimeable number, because it can be changed into a prime (2212443977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3478368 + ... + 3479003.

It is an arithmetic number, because the mean of its divisors is an integer number (281773566).

Almost surely, 2^2212443978 is an apocalyptic number.

2212443978 is an abundant number, since it is smaller than the sum of its proper divisors (2295933078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2212443978 is a wasteful number, since it uses less digits than its factorization.

2212443978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6957429.

The product of its digits is 193536, while the sum is 42.

The square root of 2212443978 is about 47036.6237946560. The cubic root of 2212443978 is about 1303.0390395391.

The spelling of 2212443978 in words is "two billion, two hundred twelve million, four hundred forty-three thousand, nine hundred seventy-eight".