211312229 has 4 divisors (see below), whose sum is σ = 211485120. Its totient is φ = 211139340.

The previous prime is 211312223. The next prime is 211312249. The reversal of 211312229 is 922213112.

It is a happy number.

211312229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211312229 - 2¹² = 211308133 is a prime.

It is a super-3 number, since 3×211312229³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211312223) 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, 84599 + ... + 87060.

It is an arithmetic number, because the mean of its divisors is an integer number (52871280).

Almost surely, 2^211312229 is an apocalyptic number.

It is an amenable number.

211312229 is a deficient number, since it is larger than the sum of its proper divisors (172891).

211312229 is a wasteful number, since it uses less digits than its factorization.

211312229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172890.

The product of its digits is 432, while the sum is 23.

The square root of 211312229 is about 14536.5824387990. The cubic root of 211312229 is about 595.6276868199.

The spelling of 211312229 in words is "two hundred eleven million, three hundred twelve thousand, two hundred twenty-nine".