1981200022 has 8 divisors (see below), whose sum is σ = 2971995696. Its totient is φ = 990534792.

The previous prime is 1981200007. The next prime is 1981200031. The reversal of 1981200022 is 2200021891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1981200022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27583 + ... + 68725.

It is an arithmetic number, because the mean of its divisors is an integer number (371499462).

Almost surely, 2^1981200022 is an apocalyptic number.

1981200022 is a deficient number, since it is larger than the sum of its proper divisors (990795674).

1981200022 is a wasteful number, since it uses less digits than its factorization.

1981200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65222.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1981200022 is about 44510.6731245440. The cubic root of 1981200022 is about 1255.9608672913.

The spelling of 1981200022 in words is "one billion, nine hundred eighty-one million, two hundred thousand, twenty-two".