6198543221 has 16 divisors (see below), whose sum is σ = 6900967920. Its totient is φ = 5530913280.

The previous prime is 6198543209. The next prime is 6198543227. The reversal of 6198543221 is 1223458916.

It can be written as a sum of positive squares in 8 ways, for example, as 794676100 + 5403867121 = 28190^2 + 73511^2 .

It is a cyclic number.

It is not a de Polignac number, because 6198543221 - 2³⁰ = 5124801397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6198543227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4751 + ... + 111443.

It is an arithmetic number, because the mean of its divisors is an integer number (431310495).

Almost surely, 2^6198543221 is an apocalyptic number.

It is an amenable number.

6198543221 is a deficient number, since it is larger than the sum of its proper divisors (702424699).

6198543221 is a wasteful number, since it uses less digits than its factorization.

6198543221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106856.

The product of its digits is 103680, while the sum is 41.

The square root of 6198543221 is about 78730.8276407660. The cubic root of 6198543221 is about 1836.9466551450.

The spelling of 6198543221 in words is "six billion, one hundred ninety-eight million, five hundred forty-three thousand, two hundred twenty-one".