208112053249 has 3 divisors (see below), whose sum is σ = 208112509443. Its totient is φ = 208111597056.

The previous prime is 208112053241. The next prime is 208112053343. The reversal of 208112053249 is 942350211802.

The square root of 208112053249 is 456193.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 329241025 + 207782812224 = 18145^2 + 455832^2 .

It is not a de Polignac number, because 208112053249 - 2³ = 208112053241 is a prime.

It is a super-3 number, since 3×208112053249³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208112053241) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 228097 + ... + 684289.

It is an arithmetic number, because the mean of its divisors is an integer number (69370836481).

Almost surely, 2^208112053249 is an apocalyptic number.

208112053249 is the 456193-rd square number.

208112053249 is the 228097-th centered octagonal number.

It is an amenable number.

208112053249 is a deficient number, since it is larger than the sum of its proper divisors (456194).

208112053249 is an frugal number, since it uses more digits than its factorization.

208112053249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912386 (or 456193 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 208112053249 in words is "two hundred eight billion, one hundred twelve million, fifty-three thousand, two hundred forty-nine".