211231315140 has 24 divisors (see below), whose sum is σ = 591447682560. Its totient is φ = 56328350688.

The previous prime is 211231315091. The next prime is 211231315151. The reversal of 211231315140 is 41513132112.

It is a self number, because there is not a number n which added to its sum of digits gives 211231315140.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1760260900 + ... + 1760261019.

It is an arithmetic number, because the mean of its divisors is an integer number (24643653440).

Almost surely, 2^211231315140 is an apocalyptic number.

211231315140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211231315140 is an abundant number, since it is smaller than the sum of its proper divisors (380216367420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211231315140 is a wasteful number, since it uses less digits than its factorization.

211231315140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520521931 (or 3520521929 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 211231315140 its reverse (41513132112), we get a palindrome (252744447252).

The spelling of 211231315140 in words is "two hundred eleven billion, two hundred thirty-one million, three hundred fifteen thousand, one hundred forty".