212157648 has 60 divisors (see below), whose sum is σ = 625004640. Its totient is φ = 66996288.

The previous prime is 212157623. The next prime is 212157653. The reversal of 212157648 is 846751212.

212157648 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 5 + 7 + 648 = 666.

212157648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 36036 + ... + 41507.

It is an arithmetic number, because the mean of its divisors is an integer number (10416744).

Almost surely, 2^212157648 is an apocalyptic number.

It is an amenable number.

212157648 is an abundant number, since it is smaller than the sum of its proper divisors (412846992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212157648 is a wasteful number, since it uses less digits than its factorization.

212157648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77576 (or 77567 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 212157648 is about 14565.6324270524. The cubic root of 212157648 is about 596.4209599031.

The spelling of 212157648 in words is "two hundred twelve million, one hundred fifty-seven thousand, six hundred forty-eight".