211213252 has 6 divisors (see below), whose sum is σ = 369623198. Its totient is φ = 105606624.

The previous prime is 211213241. The next prime is 211213259. The reversal of 211213252 is 252312112.

It can be written as a sum of positive squares in only one way, i.e., 188403076 + 22810176 = 13726^2 + 4776^2 .

It is a super-2 number, since 2×211213252² = 89222075640831008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211213259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26401653 + ... + 26401660.

Almost surely, 2^211213252 is an apocalyptic number.

It is an amenable number.

211213252 is a deficient number, since it is larger than the sum of its proper divisors (158409946).

211213252 is a wasteful number, since it uses less digits than its factorization.

211213252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52803317 (or 52803315 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 211213252 is about 14533.1776291353. The cubic root of 211213252 is about 595.5346765089.

Adding to 211213252 its reverse (252312112), we get a palindrome (463525364).

The spelling of 211213252 in words is "two hundred eleven million, two hundred thirteen thousand, two hundred fifty-two".