211022140 has 24 divisors (see below), whose sum is σ = 506453472. Its totient is φ = 72350400.

The previous prime is 211022131. The next prime is 211022143. The reversal of 211022140 is 41220112.

It is a happy number.

211022140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211022140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211022143) 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, 753511 + ... + 753790.

It is an arithmetic number, because the mean of its divisors is an integer number (21102228).

Almost surely, 2^211022140 is an apocalyptic number.

211022140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211022140 is an abundant number, since it is smaller than the sum of its proper divisors (295431332).

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

211022140 is a wasteful number, since it uses less digits than its factorization.

211022140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507317 (or 1507315 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 211022140 is about 14526.6011165723. The cubic root of 211022140 is about 595.3550031746.

Adding to 211022140 its reverse (41220112), we get a palindrome (252242252).

The spelling of 211022140 in words is "two hundred eleven million, twenty-two thousand, one hundred forty".