212831 has 8 divisors (see below), whose sum is σ = 226800. Its totient is φ = 199360.

The previous prime is 212827. The next prime is 212837. The reversal of 212831 is 138212.

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 212831 - 2² = 212827 is a prime.

It is a super-2 number, since 2×212831² = 90594069122, 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 (212837) 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, 1100 + ... + 1278.

It is an arithmetic number, because the mean of its divisors is an integer number (28350).

2²¹²⁸³¹ is an apocalyptic number.

212831 is a deficient number, since it is larger than the sum of its proper divisors (13969).

212831 is a wasteful number, since it uses less digits than its factorization.

212831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its digits is 96, while the sum is 17.

The square root of 212831 is about 461.3361030745. The cubic root of 212831 is about 59.7051272827.

The spelling of 212831 in words is "two hundred twelve thousand, eight hundred thirty-one".