2181314242 has 4 divisors (see below), whose sum is σ = 3271971366. Its totient is φ = 1090657120.

The previous prime is 2181314237. The next prime is 2181314263. The reversal of 2181314242 is 2424131812.

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., 2157509601 + 23804641 = 46449^2 + 4879^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2181314242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545328559 + ... + 545328562.

Almost surely, 2^2181314242 is an apocalyptic number.

2181314242 is a deficient number, since it is larger than the sum of its proper divisors (1090657124).

2181314242 is a wasteful number, since it uses less digits than its factorization.

2181314242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090657123.

The product of its digits is 3072, while the sum is 28.

The square root of 2181314242 is about 46704.5419846935. The cubic root of 2181314242 is about 1296.8987698373.

The spelling of 2181314242 in words is "two billion, one hundred eighty-one million, three hundred fourteen thousand, two hundred forty-two".