6146221381 has 2 divisors, whose sum is σ = 6146221382. Its totient is φ = 6146221380.

The previous prime is 6146221357. The next prime is 6146221421. The reversal of 6146221381 is 1831226416.

6146221381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3939570756 + 2206650625 = 62766^2 + 46975^2 .

It is a cyclic number.

It is not a de Polignac number, because 6146221381 - 2⁹ = 6146220869 is a prime.

It is a super-2 number, since 2×6146221381² = 75552074528523094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6146221331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3073110690 + 3073110691.

It is an arithmetic number, because the mean of its divisors is an integer number (3073110691).

Almost surely, 2^6146221381 is an apocalyptic number.

It is an amenable number.

6146221381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6146221381 is an equidigital number, since it uses as much as digits as its factorization.

6146221381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 6146221381 is about 78397.8404103072. The cubic root of 6146221381 is about 1831.7634946889.

Adding to 6146221381 its reverse (1831226416), we get a palindrome (7977447797).

The spelling of 6146221381 in words is "six billion, one hundred forty-six million, two hundred twenty-one thousand, three hundred eighty-one".