212153329 has 4 divisors (see below), whose sum is σ = 216156276. Its totient is φ = 208150384.

The previous prime is 212153327. The next prime is 212153341. The reversal of 212153329 is 923351212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 188650225 + 23503104 = 13735^2 + 4848^2 .

It is a cyclic number.

It is not a de Polignac number, because 212153329 - 2¹ = 212153327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212153297 and 212153306.

It is not an unprimeable number, because it can be changed into a prime (212153327) 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, 2001394 + ... + 2001499.

It is an arithmetic number, because the mean of its divisors is an integer number (54039069).

Almost surely, 2^212153329 is an apocalyptic number.

It is an amenable number.

212153329 is a deficient number, since it is larger than the sum of its proper divisors (4002947).

212153329 is an equidigital number, since it uses as much as digits as its factorization.

212153329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002946.

The product of its digits is 3240, while the sum is 28.

The square root of 212153329 is about 14565.4841663434. The cubic root of 212153329 is about 596.4169126618.

The spelling of 212153329 in words is "two hundred twelve million, one hundred fifty-three thousand, three hundred twenty-nine".