208228431956 has 24 divisors (see below), whose sum is σ = 365735647200. Its totient is φ = 103732810272.

The previous prime is 208228431949. The next prime is 208228431959. The reversal of 208228431956 is 659134822802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208228431959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3096911 + ... + 3163433.

It is an arithmetic number, because the mean of its divisors is an integer number (15238985300).

Almost surely, 2^208228431956 is an apocalyptic number.

It is an amenable number.

208228431956 is a deficient number, since it is larger than the sum of its proper divisors (157507215244).

208228431956 is a wasteful number, since it uses less digits than its factorization.

208228431956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69383 (or 69381 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 208228431956 in words is "two hundred eight billion, two hundred twenty-eight million, four hundred thirty-one thousand, nine hundred fifty-six".