208718225 has 12 divisors (see below), whose sum is σ = 258994956. Its totient is φ = 166855680.

The previous prime is 208718219. The next prime is 208718233. The reversal of 208718225 is 522817802.

It can be written as a sum of positive squares in 6 ways, for example, as 6822544 + 201895681 = 2612^2 + 14209^2 .

It is not a de Polignac number, because 208718225 - 2⁶ = 208718161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54989 + ... + 58661.

It is an arithmetic number, because the mean of its divisors is an integer number (21582913).

Almost surely, 2^208718225 is an apocalyptic number.

208718225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

208718225 is a deficient number, since it is larger than the sum of its proper divisors (50276731).

208718225 is a wasteful number, since it uses less digits than its factorization.

208718225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5956 (or 5951 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 208718225 is about 14447.0836157337. The cubic root of 208718225 is about 593.1803977825.

The spelling of 208718225 in words is "two hundred eight million, seven hundred eighteen thousand, two hundred twenty-five".