2142321978 has 32 divisors (see below), whose sum is σ = 4475056320. Its totient is φ = 683026560.

The previous prime is 2142321977. The next prime is 2142321983. The reversal of 2142321978 is 8791232412.

It is not an unprimeable number, because it can be changed into a prime (2142321977) 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, 68683 + ... + 94878.

It is an arithmetic number, because the mean of its divisors is an integer number (139845510).

Almost surely, 2^2142321978 is an apocalyptic number.

2142321978 is an abundant number, since it is smaller than the sum of its proper divisors (2332734342).

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

2142321978 is a wasteful number, since it uses less digits than its factorization.

2142321978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163662.

The product of its digits is 48384, while the sum is 39.

The square root of 2142321978 is about 46285.2241865587. The cubic root of 2142321978 is about 1289.1246546407.

The spelling of 2142321978 in words is "two billion, one hundred forty-two million, three hundred twenty-one thousand, nine hundred seventy-eight".