212279 has 4 divisors (see below), whose sum is σ = 224784. Its totient is φ = 199776.

The previous prime is 212243. The next prime is 212281. The reversal of 212279 is 972212.

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

It is a cyclic number.

It is not a de Polignac number, because 212279 - 2¹⁶ = 146743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212209) 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, 6227 + ... + 6260.

It is an arithmetic number, because the mean of its divisors is an integer number (56196).

2²¹²²⁷⁹ is an apocalyptic number.

212279 is a deficient number, since it is larger than the sum of its proper divisors (12505).

212279 is a wasteful number, since it uses less digits than its factorization.

212279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12504.

The product of its digits is 504, while the sum is 23.

The square root of 212279 is about 460.7374523522. The cubic root of 212279 is about 59.6534653787.

The spelling of 212279 in words is "two hundred twelve thousand, two hundred seventy-nine".