209059210851 has 8 divisors (see below), whose sum is σ = 278937726144. Its totient is φ = 139276751400.

The previous prime is 209059210847. The next prime is 209059210873. The reversal of 209059210851 is 158012950902.

209059210851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209059210851 - 2² = 209059210847 is a prime.

It is a super-2 number, since 2×209059210851² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (209059210751) 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 in 7 ways as a sum of consecutive naturals, for example, 24008881 + ... + 24017586.

It is an arithmetic number, because the mean of its divisors is an integer number (34867215768).

Almost surely, 2^209059210851 is an apocalyptic number.

209059210851 is a deficient number, since it is larger than the sum of its proper divisors (69878515293).

209059210851 is a wasteful number, since it uses less digits than its factorization.

209059210851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48027921.

The product of its (nonzero) digits is 64800, while the sum is 42.

The spelling of 209059210851 in words is "two hundred nine billion, fifty-nine million, two hundred ten thousand, eight hundred fifty-one".