2219991012 has 18 divisors (see below), whose sum is σ = 5611644038. Its totient is φ = 739996992.

The previous prime is 2219991001. The next prime is 2219991017. The reversal of 2219991012 is 2101999122.

It can be written as a sum of positive squares in only one way, i.e., 1878702336 + 341288676 = 43344^2 + 18474^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×2219991012³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 61666417 = 2219991012 / (2 + 2 + 1 + 9 + 9 + 9 + 1 + 0 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (2219991017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30833173 + ... + 30833244.

Almost surely, 2^2219991012 is an apocalyptic number.

It is an amenable number.

2219991012 is an abundant number, since it is smaller than the sum of its proper divisors (3391653026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2219991012 is a wasteful number, since it uses less digits than its factorization.

2219991012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61666427 (or 61666422 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 2219991012 is about 47116.7805776244. The cubic root of 2219991012 is about 1304.5189895027.

The spelling of 2219991012 in words is "two billion, two hundred nineteen million, nine hundred ninety-one thousand, twelve".