212406278 has 24 divisors (see below), whose sum is σ = 372929112. Its totient is φ = 90465984.

The previous prime is 212406269. The next prime is 212406287. The reversal of 212406278 is 872604212.

212406278 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212406269) and next prime (212406287).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9326 + ... + 22622.

It is an arithmetic number, because the mean of its divisors is an integer number (15538713).

Almost surely, 2^212406278 is an apocalyptic number.

212406278 is a deficient number, since it is larger than the sum of its proper divisors (160522834).

212406278 is a wasteful number, since it uses less digits than its factorization.

212406278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13476 (or 13469 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 212406278 is about 14574.1647445059. The cubic root of 212406278 is about 596.6538531557.

The spelling of 212406278 in words is "two hundred twelve million, four hundred six thousand, two hundred seventy-eight".