208211481 has 24 divisors (see below), whose sum is σ = 317154240. Its totient is φ = 131263200.

The previous prime is 208211459. The next prime is 208211501. The reversal of 208211481 is 184112802.

It is not a de Polignac number, because 208211481 - 2⁵ = 208211449 is a prime.

It is a super-2 number, since 2×208211481² = 86704041640426722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208211431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175711 + ... + 176891.

It is an arithmetic number, because the mean of its divisors is an integer number (13214760).

Almost surely, 2^208211481 is an apocalyptic number.

It is an amenable number.

208211481 is a deficient number, since it is larger than the sum of its proper divisors (108942759).

208211481 is a wasteful number, since it uses less digits than its factorization.

208211481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2234 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 208211481 is about 14429.5350236936. The cubic root of 208211481 is about 592.6999506746.

The spelling of 208211481 in words is "two hundred eight million, two hundred eleven thousand, four hundred eighty-one".