212179231 has 4 divisors (see below), whose sum is σ = 231468264. Its totient is φ = 192890200.

The previous prime is 212179229. The next prime is 212179271. The reversal of 212179231 is 132971212.

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 212179231 - 2¹ = 212179229 is a prime.

It is a super-2 number, since 2×212179231² = 90040052135502722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212179231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212179211) 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, 9644500 + ... + 9644521.

It is an arithmetic number, because the mean of its divisors is an integer number (57867066).

Almost surely, 2^212179231 is an apocalyptic number.

212179231 is a deficient number, since it is larger than the sum of its proper divisors (19289033).

212179231 is a wasteful number, since it uses less digits than its factorization.

212179231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19289032.

The product of its digits is 1512, while the sum is 28.

The square root of 212179231 is about 14566.3732960542. The cubic root of 212179231 is about 596.4411840418.

The spelling of 212179231 in words is "two hundred twelve million, one hundred seventy-nine thousand, two hundred thirty-one".