1881144322 has 4 divisors (see below), whose sum is σ = 2821716486. Its totient is φ = 940572160.

The previous prime is 1881144313. The next prime is 1881144323. The reversal of 1881144322 is 2234411881.

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., 1507070041 + 374074281 = 38821^2 + 19341^2 .

It is not an unprimeable number, because it can be changed into a prime (1881144323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470286079 + ... + 470286082.

Almost surely, 2^1881144322 is an apocalyptic number.

1881144322 is a deficient number, since it is larger than the sum of its proper divisors (940572164).

1881144322 is an equidigital number, since it uses as much as digits as its factorization.

1881144322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940572163.

The product of its digits is 12288, while the sum is 34.

The square root of 1881144322 is about 43372.1606794036. The cubic root of 1881144322 is about 1234.4515197403.

The spelling of 1881144322 in words is "one billion, eight hundred eighty-one million, one hundred forty-four thousand, three hundred twenty-two".