208313481 has 8 divisors (see below), whose sum is σ = 277905024. Its totient is φ = 138798800.

The previous prime is 208313471. The next prime is 208313509. The reversal of 208313481 is 184313802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 208313481 - 2⁹ = 208312969 is a prime.

It is a super-2 number, since 2×208313481² = 86789012732674722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208313471) 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 7 ways as a sum of consecutive naturals, for example, 12561 + ... + 23966.

It is an arithmetic number, because the mean of its divisors is an integer number (34738128).

Almost surely, 2^208313481 is an apocalyptic number.

It is an amenable number.

208313481 is a deficient number, since it is larger than the sum of its proper divisors (69591543).

208313481 is a wasteful number, since it uses less digits than its factorization.

208313481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38431.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 208313481 is about 14433.0690083572. The cubic root of 208313481 is about 592.7967201151.

The spelling of 208313481 in words is "two hundred eight million, three hundred thirteen thousand, four hundred eighty-one".