2208861225 has 24 divisors (see below), whose sum is σ = 4057761120. Its totient is φ = 1178058960.

The previous prime is 2208861223. The next prime is 2208861227. The reversal of 2208861225 is 5221688022.

It is an interprime number because it is at equal distance from previous prime (2208861223) and next prime (2208861227).

It is not a de Polignac number, because 2208861225 - 2¹ = 2208861223 is a prime.

It is a super-2 number, since 2×2208861225² = 9758135822617001250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2208861225.

It is not an unprimeable number, because it can be changed into a prime (2208861223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1635519 + ... + 1636868.

It is an arithmetic number, because the mean of its divisors is an integer number (169073380).

Almost surely, 2^2208861225 is an apocalyptic number.

2208861225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2208861225 is a deficient number, since it is larger than the sum of its proper divisors (1848899895).

2208861225 is a wasteful number, since it uses less digits than its factorization.

2208861225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272406 (or 3272395 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 2208861225 is about 46998.5236470253. The cubic root of 2208861225 is about 1302.3352945212.

It can be divided in two parts, 220886 and 1225, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 2208861225 in words is "two billion, two hundred eight million, eight hundred sixty-one thousand, two hundred twenty-five".