2198040081 has 16 divisors (see below), whose sum is σ = 2974693248. Its totient is φ = 1443411200.

The previous prime is 2198040059. The next prime is 2198040191. The reversal of 2198040081 is 1800408912.

It is a cyclic number.

It is not a de Polignac number, because 2198040081 - 2⁶ = 2198040017 is a prime.

It is a super-2 number, since 2×2198040081² = 9662760395364973122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2198040281) 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, 267961 + ... + 276041.

It is an arithmetic number, because the mean of its divisors is an integer number (185918328).

Almost surely, 2^2198040081 is an apocalyptic number.

It is an amenable number.

2198040081 is a deficient number, since it is larger than the sum of its proper divisors (776653167).

2198040081 is a wasteful number, since it uses less digits than its factorization.

2198040081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9432.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 2198040081 is about 46883.2601362149. The cubic root of 2198040081 is about 1300.2051118176.

Adding to 2198040081 its reverse (1800408912), we get a palindrome (3998448993).

The spelling of 2198040081 in words is "two billion, one hundred ninety-eight million, forty thousand, eighty-one".