2208465561 has 4 divisors (see below), whose sum is σ = 2944620752. Its totient is φ = 1472310372.

The previous prime is 2208465557. The next prime is 2208465587. The reversal of 2208465561 is 1655648022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2208465561 - 2² = 2208465557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2208465541) 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, 368077591 + ... + 368077596.

It is an arithmetic number, because the mean of its divisors is an integer number (736155188).

Almost surely, 2^2208465561 is an apocalyptic number.

It is an amenable number.

2208465561 is a deficient number, since it is larger than the sum of its proper divisors (736155191).

2208465561 is an equidigital number, since it uses as much as digits as its factorization.

2208465561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736155190.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 2208465561 is about 46994.3141347972. The cubic root of 2208465561 is about 1302.2575292672.

The spelling of 2208465561 in words is "two billion, two hundred eight million, four hundred sixty-five thousand, five hundred sixty-one".