2277181642 has 4 divisors (see below), whose sum is σ = 3415772466. Its totient is φ = 1138590820.

The previous prime is 2277181633. The next prime is 2277181661. The reversal of 2277181642 is 2461817722.

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., 1674528241 + 602653401 = 40921^2 + 24549^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2277181595 and 2277181604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569295409 + ... + 569295412.

Almost surely, 2^2277181642 is an apocalyptic number.

2277181642 is a deficient number, since it is larger than the sum of its proper divisors (1138590824).

2277181642 is a wasteful number, since it uses less digits than its factorization.

2277181642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138590823.

The product of its digits is 75264, while the sum is 40.

The square root of 2277181642 is about 47719.8244129209. The cubic root of 2277181642 is about 1315.6263343697.

The spelling of 2277181642 in words is "two billion, two hundred seventy-seven million, one hundred eighty-one thousand, six hundred forty-two".