211336830 has 128 divisors (see below), whose sum is σ = 585446400. Its totient is φ = 54214272.

The previous prime is 211336817. The next prime is 211336831. The reversal of 211336830 is 38633112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 211336794 and 211336803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211336831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1265407 + ... + 1265573.

It is an arithmetic number, because the mean of its divisors is an integer number (4573800).

Almost surely, 2^211336830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211336830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292723200).

211336830 is an abundant number, since it is smaller than the sum of its proper divisors (374109570).

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

211336830 is a wasteful number, since it uses less digits than its factorization.

211336830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 211336830 is about 14537.4285896784. The cubic root of 211336830 is about 595.6508002765.

Adding to 211336830 its reverse (38633112), we get a palindrome (249969942).

The spelling of 211336830 in words is "two hundred eleven million, three hundred thirty-six thousand, eight hundred thirty".