212195823 has 12 divisors (see below), whose sum is σ = 329120280. Its totient is φ = 121254672.

The previous prime is 212195821. The next prime is 212195827. The reversal of 212195823 is 328591212.

It is a happy number.

It is not a de Polignac number, because 212195823 - 2¹ = 212195821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212195821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 721608 + ... + 721901.

It is an arithmetic number, because the mean of its divisors is an integer number (27426690).

Almost surely, 2^212195823 is an apocalyptic number.

212195823 is a deficient number, since it is larger than the sum of its proper divisors (116924457).

212195823 is a wasteful number, since it uses less digits than its factorization.

212195823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443526 (or 1443519 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 212195823 is about 14566.9428158416. The cubic root of 212195823 is about 596.4567304805.

The spelling of 212195823 in words is "two hundred twelve million, one hundred ninety-five thousand, eight hundred twenty-three".