4200199981 has 2 divisors, whose sum is σ = 4200199982. Its totient is φ = 4200199980.

The previous prime is 4200199973. The next prime is 4200200009. The reversal of 4200199981 is 1899910024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2835562500 + 1364637481 = 53250^2 + 36941^2 .

It is a cyclic number.

It is not a de Polignac number, because 4200199981 - 2³ = 4200199973 is a prime.

It is a super-2 number, since 2×4200199981² = 35283359760784800722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4200199961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100099990 + 2100099991.

It is an arithmetic number, because the mean of its divisors is an integer number (2100099991).

Almost surely, 2^4200199981 is an apocalyptic number.

It is an amenable number.

4200199981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4200199981 is an equidigital number, since it uses as much as digits as its factorization.

4200199981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 4200199981 is about 64808.9498526245. The cubic root of 4200199981 is about 1613.4542531637.

The spelling of 4200199981 in words is "four billion, two hundred million, one hundred ninety-nine thousand, nine hundred eighty-one".