2191141444 has 6 divisors (see below), whose sum is σ = 3834497534. Its totient is φ = 1095570720.

The previous prime is 2191141409. The next prime is 2191141451. The reversal of 2191141444 is 4441411912.

It can be written as a sum of positive squares in only one way, i.e., 1883560000 + 307581444 = 43400^2 + 17538^2 .

It is a super-2 number, since 2×2191141444² = 9602201655228810272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273892677 + ... + 273892684.

Almost surely, 2^2191141444 is an apocalyptic number.

It is an amenable number.

2191141444 is a deficient number, since it is larger than the sum of its proper divisors (1643356090).

2191141444 is a wasteful number, since it uses less digits than its factorization.

2191141444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547785365 (or 547785363 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 2191141444 is about 46809.6298212238. The cubic root of 2191141444 is about 1298.8434376262.

The spelling of 2191141444 in words is "two billion, one hundred ninety-one million, one hundred forty-one thousand, four hundred forty-four".