211130310440 has 64 divisors (see below), whose sum is σ = 549447615360. Its totient is φ = 71515388160.

The previous prime is 211130310437. The next prime is 211130310473. The reversal of 211130310440 is 44013031112.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 15 ways as a sum of consecutive naturals, for example, 4519151 + ... + 4565630.

It is an arithmetic number, because the mean of its divisors is an integer number (8585118990).

Almost surely, 2^211130310440 is an apocalyptic number.

211130310440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211130310440 is an abundant number, since it is smaller than the sum of its proper divisors (338317304920).

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

211130310440 is a wasteful number, since it uses less digits than its factorization.

211130310440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9084882 (or 9084878 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 211130310440 its reverse (44013031112), we get a palindrome (255143341552).

The spelling of 211130310440 in words is "two hundred eleven billion, one hundred thirty million, three hundred ten thousand, four hundred forty".