2321219978 has 32 divisors (see below), whose sum is σ = 4362854400. Its totient is φ = 899814960.

The previous prime is 2321219977. The next prime is 2321219981. The reversal of 2321219978 is 8799121232.

It is not an unprimeable number, because it can be changed into a prime (2321219977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7226 + ... + 68517.

It is an arithmetic number, because the mean of its divisors is an integer number (136339200).

Almost surely, 2^2321219978 is an apocalyptic number.

2321219978 is a deficient number, since it is larger than the sum of its proper divisors (2041634422).

2321219978 is a wasteful number, since it uses less digits than its factorization.

2321219978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75962.

The product of its digits is 108864, while the sum is 44.

The square root of 2321219978 is about 48179.0408580329. The cubic root of 2321219978 is about 1324.0531938754.

The spelling of 2321219978 in words is "two billion, three hundred twenty-one million, two hundred nineteen thousand, nine hundred seventy-eight".