212331 has 8 divisors (see below), whose sum is σ = 323584. Its totient is φ = 121320.

The previous prime is 212297. The next prime is 212353. The reversal of 212331 is 133212.

It is a happy number.

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

It is not a de Polignac number, because 212331 - 2⁷ = 212203 is a prime.

It is a super-2 number, since 2×212331² = 90168907122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (212131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5035 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (40448).

2²¹²³³¹ is an apocalyptic number.

212331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212331 is a deficient number, since it is larger than the sum of its proper divisors (111253).

212331 is a wasteful number, since it uses less digits than its factorization.

212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121.

The product of its digits is 36, while the sum is 12.

The square root of 212331 is about 460.7938801677. The cubic root of 212331 is about 59.6583358981.

Adding to 212331 its reverse (133212), we get a palindrome (345543).

The spelling of 212331 in words is "two hundred twelve thousand, three hundred thirty-one".