211707140 has 12 divisors (see below), whose sum is σ = 444585036. Its totient is φ = 84682848.

The previous prime is 211707131. The next prime is 211707143. The reversal of 211707140 is 41707112.

It can be written as a sum of positive squares in 2 ways, for example, as 157301764 + 54405376 = 12542^2 + 7376^2 .

It is not an unprimeable number, because it can be changed into a prime (211707143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5292659 + ... + 5292698.

It is an arithmetic number, because the mean of its divisors is an integer number (37048753).

Almost surely, 2^211707140 is an apocalyptic number.

211707140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211707140 is an abundant number, since it is smaller than the sum of its proper divisors (232877896).

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

211707140 is a wasteful number, since it uses less digits than its factorization.

211707140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10585366 (or 10585364 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 211707140 is about 14550.1594492981. The cubic root of 211707140 is about 595.9985023160.

The spelling of 211707140 in words is "two hundred eleven million, seven hundred seven thousand, one hundred forty".