208211449 has 2 divisors, whose sum is σ = 208211450. Its totient is φ = 208211448.

The previous prime is 208211441. The next prime is 208211453. The reversal of 208211449 is 944112802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155750400 + 52461049 = 12480^2 + 7243^2 .

It is a cyclic number.

It is not a de Polignac number, because 208211449 - 2³ = 208211441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208211449.

It is not a weakly prime, because it can be changed into another prime (208211441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104105724 + 104105725.

It is an arithmetic number, because the mean of its divisors is an integer number (104105725).

Almost surely, 2^208211449 is an apocalyptic number.

It is an amenable number.

208211449 is a deficient number, since it is larger than the sum of its proper divisors (1).

208211449 is an equidigital number, since it uses as much as digits as its factorization.

208211449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 208211449 is about 14429.5339148567. The cubic root of 208211449 is about 592.6999203106.

It can be divided in two parts, 2082 and 11449, that added together give a palindrome (13531).

The spelling of 208211449 in words is "two hundred eight million, two hundred eleven thousand, four hundred forty-nine".