2208543457 has 4 divisors (see below), whose sum is σ = 2338457796. Its totient is φ = 2078629120.

The previous prime is 2208543427. The next prime is 2208543461. The reversal of 2208543457 is 7543458022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7543458022 = 2 ⋅3771729011.

It can be written as a sum of positive squares in 2 ways, for example, as 1694886561 + 513656896 = 41169^2 + 22664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2208543457 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2208543427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64957144 + ... + 64957177.

It is an arithmetic number, because the mean of its divisors is an integer number (584614449).

Almost surely, 2^2208543457 is an apocalyptic number.

It is an amenable number.

2208543457 is a deficient number, since it is larger than the sum of its proper divisors (129914339).

2208543457 is a wasteful number, since it uses less digits than its factorization.

2208543457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129914338.

The product of its (nonzero) digits is 268800, while the sum is 40.

The square root of 2208543457 is about 46995.1429086028. The cubic root of 2208543457 is about 1302.2728399671.

The spelling of 2208543457 in words is "two billion, two hundred eight million, five hundred forty-three thousand, four hundred fifty-seven".