212390056 has 16 divisors (see below), whose sum is σ = 419191200. Its totient is φ = 100605744.

The previous prime is 212390047. The next prime is 212390063. The reversal of 212390056 is 650093212.

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 3 ways as a sum of consecutive naturals, for example, 698500 + ... + 698803.

It is an arithmetic number, because the mean of its divisors is an integer number (26199450).

Almost surely, 2^212390056 is an apocalyptic number.

It is an amenable number.

212390056 is a deficient number, since it is larger than the sum of its proper divisors (206801144).

212390056 is a wasteful number, since it uses less digits than its factorization.

212390056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397328 (or 1397324 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 212390056 is about 14573.6082011285. The cubic root of 212390056 is about 596.6386634521.

The spelling of 212390056 in words is "two hundred twelve million, three hundred ninety thousand, fifty-six".