211712140 has 24 divisors (see below), whose sum is σ = 445626720. Its totient is φ = 84488448.

The previous prime is 211712129. The next prime is 211712141. The reversal of 211712140 is 41217112.

211712140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (211712141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3277 + ... + 20836.

It is an arithmetic number, because the mean of its divisors is an integer number (18567780).

Almost surely, 2^211712140 is an apocalyptic number.

211712140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211712140 is an abundant number, since it is smaller than the sum of its proper divisors (233914580).

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

211712140 is a wasteful number, since it uses less digits than its factorization.

211712140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24561 (or 24559 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 211712140 is about 14550.3312677066. The cubic root of 211712140 is about 596.0031942834.

Adding to 211712140 its reverse (41217112), we get a palindrome (252929252).

The spelling of 211712140 in words is "two hundred eleven million, seven hundred twelve thousand, one hundred forty".