211512772 has 12 divisors (see below), whose sum is σ = 374306940. Its totient is φ = 104567936.

The previous prime is 211512767. The next prime is 211512773. The reversal of 211512772 is 277215112.

It can be written as a sum of positive squares in 2 ways, for example, as 89984196 + 121528576 = 9486^2 + 11024^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211512772.

It is not an unprimeable number, because it can be changed into a prime (211512773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296713 + ... + 297424.

It is an arithmetic number, because the mean of its divisors is an integer number (31192245).

Almost surely, 2^211512772 is an apocalyptic number.

It is an amenable number.

211512772 is a deficient number, since it is larger than the sum of its proper divisors (162794168).

211512772 is a wasteful number, since it uses less digits than its factorization.

211512772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594230 (or 594228 counting only the distinct ones).

The product of its digits is 1960, while the sum is 28.

The square root of 211512772 is about 14543.4786760252. The cubic root of 211512772 is about 595.8160513655.

Adding to 211512772 its reverse (277215112), we get a palindrome (488727884).

The spelling of 211512772 in words is "two hundred eleven million, five hundred twelve thousand, seven hundred seventy-two".