208481731 has 2 divisors, whose sum is σ = 208481732. Its totient is φ = 208481730.

The previous prime is 208481687. The next prime is 208481747. The reversal of 208481731 is 137184802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208481731 - 2⁹ = 208481219 is a prime.

It is a super-2 number, since 2×208481731² = 86929264321512722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (208482731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104240865 + 104240866.

It is an arithmetic number, because the mean of its divisors is an integer number (104240866).

Almost surely, 2^208481731 is an apocalyptic number.

208481731 is a deficient number, since it is larger than the sum of its proper divisors (1).

208481731 is an equidigital number, since it uses as much as digits as its factorization.

208481731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 208481731 is about 14438.8964606025. The cubic root of 208481731 is about 592.9562732522.

It can be divided in two parts, 208481 and 731, that multiplied together give a triangular number (152399611 = T₁₇₄₅₈).

The spelling of 208481731 in words is "two hundred eight million, four hundred eighty-one thousand, seven hundred thirty-one".