211311330 has 32 divisors (see below), whose sum is σ = 507558528. Its totient is φ = 56304000.

The previous prime is 211311323. The next prime is 211311341. The reversal of 211311330 is 33113112.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 52075 + ... + 55985.

It is an arithmetic number, because the mean of its divisors is an integer number (15861204).

Almost surely, 2^211311330 is an apocalyptic number.

211311330 is an abundant number, since it is smaller than the sum of its proper divisors (296247198).

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

211311330 is a wasteful number, since it uses less digits than its factorization.

211311330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 211311330 is about 14536.5515167800. The cubic root of 211311330 is about 595.6268421455.

Adding to 211311330 its reverse (33113112), we get a palindrome (244424442).

The spelling of 211311330 in words is "two hundred eleven million, three hundred eleven thousand, three hundred thirty".