211131955904 has 28 divisors (see below), whose sum is σ = 419020371000. Its totient is φ = 105552019968.

The previous prime is 211131955901. The next prime is 211131955999. The reversal of 211131955904 is 409559131112.

It is not an unprimeable number, because it can be changed into a prime (211131955901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278492 + ... + 706980.

It is an arithmetic number, because the mean of its divisors is an integer number (14965013250).

Almost surely, 2^211131955904 is an apocalyptic number.

It is an amenable number.

211131955904 is a deficient number, since it is larger than the sum of its proper divisors (207888415096).

211131955904 is an equidigital number, since it uses as much as digits as its factorization.

211131955904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436200 (or 436190 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 41.

The spelling of 211131955904 in words is "two hundred eleven billion, one hundred thirty-one million, nine hundred fifty-five thousand, nine hundred four".