211148340 has 96 divisors (see below), whose sum is σ = 639198336. Its totient is φ = 51770880.

The previous prime is 211148321. The next prime is 211148341. The reversal of 211148340 is 43841112.

211148340 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

211148340 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 211148340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211148341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328059 + ... + 328701.

It is an arithmetic number, because the mean of its divisors is an integer number (6658316).

Almost surely, 2^211148340 is an apocalyptic number.

211148340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211148340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319599168).

211148340 is an abundant number, since it is smaller than the sum of its proper divisors (428049996).

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

211148340 is a wasteful number, since it uses less digits than its factorization.

211148340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 211148340 is about 14530.9442225893. The cubic root of 211148340 is about 595.4736618592.

Adding to 211148340 its reverse (43841112), we get a palindrome (254989452).

The spelling of 211148340 in words is "two hundred eleven million, one hundred forty-eight thousand, three hundred forty".