208402151 has 2 divisors, whose sum is σ = 208402152. Its totient is φ = 208402150.

The previous prime is 208402147. The next prime is 208402177. The reversal of 208402151 is 151204802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208402151 - 2² = 208402147 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208402121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104201075 + 104201076.

It is an arithmetic number, because the mean of its divisors is an integer number (104201076).

Almost surely, 2^208402151 is an apocalyptic number.

208402151 is a deficient number, since it is larger than the sum of its proper divisors (1).

208402151 is an equidigital number, since it uses as much as digits as its factorization.

208402151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 208402151 is about 14436.1404468092. The cubic root of 208402151 is about 592.8808174552.

Adding to 208402151 its reverse (151204802), we get a palindrome (359606953).

The spelling of 208402151 in words is "two hundred eight million, four hundred two thousand, one hundred fifty-one".