2178313442 has 4 divisors (see below), whose sum is σ = 3267470166. Its totient is φ = 1089156720.

The previous prime is 2178313439. The next prime is 2178313483. The reversal of 2178313442 is 2443138712.

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

It can be written as a sum of positive squares in only one way, i.e., 2170534921 + 7778521 = 46589^2 + 2789^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544578359 + ... + 544578362.

Almost surely, 2^2178313442 is an apocalyptic number.

2178313442 is a deficient number, since it is larger than the sum of its proper divisors (1089156724).

2178313442 is a wasteful number, since it uses less digits than its factorization.

2178313442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089156723.

The product of its digits is 32256, while the sum is 35.

The square root of 2178313442 is about 46672.4055733149. The cubic root of 2178313442 is about 1296.3037891115.

The spelling of 2178313442 in words is "two billion, one hundred seventy-eight million, three hundred thirteen thousand, four hundred forty-two".