208530156 has 12 divisors (see below), whose sum is σ = 486570392. Its totient is φ = 69510048.

The previous prime is 208530139. The next prime is 208530193. The reversal of 208530156 is 651035802.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×208530156² = 86969651922768672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8688745 + ... + 8688768.

Almost surely, 2^208530156 is an apocalyptic number.

It is an amenable number.

208530156 is an abundant number, since it is smaller than the sum of its proper divisors (278040236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208530156 is a wasteful number, since it uses less digits than its factorization.

208530156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17377520 (or 17377518 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 208530156 is about 14440.5732573191. The cubic root of 208530156 is about 593.0021792484.

Adding to 208530156 its reverse (651035802), we get a palindrome (859565958).

The spelling of 208530156 in words is "two hundred eight million, five hundred thirty thousand, one hundred fifty-six".