210055931309 has 8 divisors (see below), whose sum is σ = 244963185600. Its totient is φ = 180047940828.

The previous prime is 210055931287. The next prime is 210055931329. The reversal of 210055931309 is 903139550012.

It is a happy number.

210055931309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-210055931309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210055931329) 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, 306203639 + ... + 306204324.

It is an arithmetic number, because the mean of its divisors is an integer number (30620398200).

Almost surely, 2^210055931309 is an apocalyptic number.

It is an amenable number.

210055931309 is a deficient number, since it is larger than the sum of its proper divisors (34907254291).

210055931309 is an frugal number, since it uses more digits than its factorization.

210055931309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612407984 (or 612407970 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 38.

The spelling of 210055931309 in words is "two hundred ten billion, fifty-five million, nine hundred thirty-one thousand, three hundred nine".