208748231 has 4 divisors (see below), whose sum is σ = 219735000. Its totient is φ = 197761464.

The previous prime is 208748213. The next prime is 208748233. The reversal of 208748231 is 132847802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 208748231 - 2¹⁰ = 208747207 is a prime.

It is a super-2 number, since 2×208748231² = 87151647891258722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208748191 and 208748200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208748233) 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, 5493356 + ... + 5493393.

It is an arithmetic number, because the mean of its divisors is an integer number (54933750).

Almost surely, 2^208748231 is an apocalyptic number.

208748231 is a deficient number, since it is larger than the sum of its proper divisors (10986769).

208748231 is a wasteful number, since it uses less digits than its factorization.

208748231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10986768.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 208748231 is about 14448.1220579008. The cubic root of 208748231 is about 593.2088222579.

The spelling of 208748231 in words is "two hundred eight million, seven hundred forty-eight thousand, two hundred thirty-one".