211055140 has 12 divisors (see below), whose sum is σ = 443215836. Its totient is φ = 84422048.

The previous prime is 211055129. The next prime is 211055147. The reversal of 211055140 is 41550112.

It can be written as a sum of positive squares in 2 ways, for example, as 98525476 + 112529664 = 9926^2 + 10608^2 .

It is not an unprimeable number, because it can be changed into a prime (211055147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5276359 + ... + 5276398.

It is an arithmetic number, because the mean of its divisors is an integer number (36934653).

Almost surely, 2^211055140 is an apocalyptic number.

211055140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211055140 is an abundant number, since it is smaller than the sum of its proper divisors (232160696).

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

211055140 is a wasteful number, since it uses less digits than its factorization.

211055140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552766 (or 10552764 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 211055140 is about 14527.7369194242. The cubic root of 211055140 is about 595.3860357652.

The spelling of 211055140 in words is "two hundred eleven million, fifty-five thousand, one hundred forty".