212281273 has 4 divisors (see below), whose sum is σ = 219129088. Its totient is φ = 205433460.

The previous prime is 212281219. The next prime is 212281301. The reversal of 212281273 is 372182212.

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 a de Polignac number, because none of the positive numbers 2^k-212281273 is a prime.

It is a super-3 number, since 3×212281273³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212281213) 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, 3423861 + ... + 3423922.

It is an arithmetic number, because the mean of its divisors is an integer number (54782272).

Almost surely, 2^212281273 is an apocalyptic number.

It is an amenable number.

212281273 is a deficient number, since it is larger than the sum of its proper divisors (6847815).

212281273 is an equidigital number, since it uses as much as digits as its factorization.

212281273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6847814.

The product of its digits is 2688, while the sum is 28.

The square root of 212281273 is about 14569.8755313832. The cubic root of 212281273 is about 596.5367829324.

The spelling of 212281273 in words is "two hundred twelve million, two hundred eighty-one thousand, two hundred seventy-three".