213212229 has 4 divisors (see below), whose sum is σ = 284282976. Its totient is φ = 142141484.

The previous prime is 213212179. The next prime is 213212261. The reversal of 213212229 is 922212312.

213212229 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 213212229 - 2¹¹ = 213210181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213212199 and 213212208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212029) 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, 35535369 + ... + 35535374.

It is an arithmetic number, because the mean of its divisors is an integer number (71070744).

Almost surely, 2^213212229 is an apocalyptic number.

It is an amenable number.

213212229 is a deficient number, since it is larger than the sum of its proper divisors (71070747).

213212229 is an equidigital number, since it uses as much as digits as its factorization.

213212229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71070746.

The product of its digits is 864, while the sum is 24.

The square root of 213212229 is about 14601.7885548312. The cubic root of 213212229 is about 597.4075453196.

The spelling of 213212229 in words is "two hundred thirteen million, two hundred twelve thousand, two hundred twenty-nine".