212810 has 16 divisors (see below), whose sum is σ = 412776. Its totient is φ = 78528.

The previous prime is 212801. The next prime is 212827. The reversal of 212810 is 18212.

It can be written as a sum of positive squares in 4 ways, for example, as 69169 + 143641 = 263^2 + 379^2 .

It is a super-2 number, since 2×212810² = 90576192200, which contains 22 as substring.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 212810.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 948.

2²¹²⁸¹⁰ is an apocalyptic number.

212810 is a deficient number, since it is larger than the sum of its proper divisors (199966).

212810 is a wasteful number, since it uses less digits than its factorization.

212810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 212810 is about 461.3133425341. The cubic root of 212810 is about 59.7031635198.

The spelling of 212810 in words is "two hundred twelve thousand, eight hundred ten".