211415812 has 24 divisors (see below), whose sum is σ = 391154400. Its totient is φ = 99706176.

The previous prime is 211415801. The next prime is 211415833. The reversal of 211415812 is 218514112.

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 7 ways as a sum of consecutive naturals, for example, 11739 + ... + 23677.

It is an arithmetic number, because the mean of its divisors is an integer number (16298100).

Almost surely, 2^211415812 is an apocalyptic number.

It is an amenable number.

211415812 is a deficient number, since it is larger than the sum of its proper divisors (179738588).

211415812 is a wasteful number, since it uses less digits than its factorization.

211415812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12195 (or 12193 counting only the distinct ones).

The product of its digits is 640, while the sum is 25.

The square root of 211415812 is about 14540.1448410943. The cubic root of 211415812 is about 595.7249943675.

Adding to 211415812 its reverse (218514112), we get a palindrome (429929924).

The spelling of 211415812 in words is "two hundred eleven million, four hundred fifteen thousand, eight hundred twelve".