212315231 has 8 divisors (see below), whose sum is σ = 223742304. Its totient is φ = 201071200.

The previous prime is 212315219. The next prime is 212315251. The reversal of 212315231 is 132513212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212315231 - 2⁶ = 212315167 is a prime.

It is a super-2 number, since 2×212315231² = 90155514629166722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212315251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43376 + ... + 48021.

It is an arithmetic number, because the mean of its divisors is an integer number (27967788).

Almost surely, 2^212315231 is an apocalyptic number.

212315231 is a deficient number, since it is larger than the sum of its proper divisors (11427073).

212315231 is a wasteful number, since it uses less digits than its factorization.

212315231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91521.

The product of its digits is 360, while the sum is 20.

The square root of 212315231 is about 14571.0408344771. The cubic root of 212315231 is about 596.5685899711.

Adding to 212315231 its reverse (132513212), we get a palindrome (344828443).

It can be divided in two parts, 21231 and 5231, that added together give a palindrome (26462).

The spelling of 212315231 in words is "two hundred twelve million, three hundred fifteen thousand, two hundred thirty-one".