211333340 has 48 divisors (see below), whose sum is σ = 451459008. Its totient is φ = 83088384.

The previous prime is 211333327. The next prime is 211333357. The reversal of 211333340 is 43333112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356084 + ... + 356676.

It is an arithmetic number, because the mean of its divisors is an integer number (9405396).

Almost surely, 2^211333340 is an apocalyptic number.

211333340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211333340 is an abundant number, since it is smaller than the sum of its proper divisors (240125668).

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

211333340 is a wasteful number, since it uses less digits than its factorization.

211333340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 211333340 is about 14537.3085541994. The cubic root of 211333340 is about 595.6475214148.

Adding to 211333340 its reverse (43333112), we get a palindrome (254666452).

It can be divided in two parts, 2113 and 33340, that added together give a palindrome (35453).

The spelling of 211333340 in words is "two hundred eleven million, three hundred thirty-three thousand, three hundred forty".