211431657902 has 8 divisors (see below), whose sum is σ = 317150425512. Its totient is φ = 105714849400.

The previous prime is 211431657887. The next prime is 211431657919. The reversal of 211431657902 is 209756134112.

211431657902 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 a self number, because there is not a number n which added to its sum of digits gives 211431657902.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 181049 + ... + 675012.

It is an arithmetic number, because the mean of its divisors is an integer number (39643803189).

Almost surely, 2^211431657902 is an apocalyptic number.

211431657902 is a deficient number, since it is larger than the sum of its proper divisors (105718767610).

211431657902 is a wasteful number, since it uses less digits than its factorization.

211431657902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979554.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 211431657902 in words is "two hundred eleven billion, four hundred thirty-one million, six hundred fifty-seven thousand, nine hundred two".