208542481 has 9 divisors (see below), whose sum is σ = 242707881. Its totient is φ = 178664052.

The previous prime is 208542473. The next prime is 208542493. The reversal of 208542481 is 184245802.

The square root of 208542481 is 14441.

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

It is not a de Polignac number, because 208542481 - 2³ = 208542473 is a prime.

It is a super-2 number, since 2×208542481² = 86979932763270722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208542401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 100056 + ... + 102118.

Almost surely, 2^208542481 is an apocalyptic number.

208542481 is the 14441-st square number.

208542481 is the 7221-st centered octagonal number.

It is an amenable number.

208542481 is a deficient number, since it is larger than the sum of its proper divisors (34165400).

208542481 is an frugal number, since it uses more digits than its factorization.

208542481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The cubic root of 208542481 is about 593.0138619837.

The spelling of 208542481 in words is "two hundred eight million, five hundred forty-two thousand, four hundred eighty-one".