208203381 has 12 divisors (see below), whose sum is σ = 301691052. Its totient is φ = 138362496.

The previous prime is 208203379. The next prime is 208203397. The reversal of 208203381 is 183302802.

It can be written as a sum of positive squares in 2 ways, for example, as 19580625 + 188622756 = 4425^2 + 13734^2 .

It is not a de Polignac number, because 208203381 - 2¹ = 208203379 is a prime.

It is a super-2 number, since 2×208203381² = 86697295719662322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208201381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33636 + ... + 39341.

It is an arithmetic number, because the mean of its divisors is an integer number (25140921).

Almost surely, 2^208203381 is an apocalyptic number.

It is an amenable number.

208203381 is a deficient number, since it is larger than the sum of its proper divisors (93487671).

208203381 is a wasteful number, since it uses less digits than its factorization.

208203381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73300 (or 73297 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 208203381 is about 14429.2543466390. The cubic root of 208203381 is about 592.6922646882.

The spelling of 208203381 in words is "two hundred eight million, two hundred three thousand, three hundred eighty-one".